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Finding the Fourth Proportional to 100,609,047.20, 150,913,570.80 and 80,453,655.20

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Solution

The fourth proportional to 100,609,047.20, 150,913,570.80 and 80,453,655.20 is: 120,680,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,609,047.20 : 150,913,570.80 = 80,453,655.20 : x
  2. Step 2: Convert to fraction form
    100,609,047.20/150,913,570.80 = 80,453,655.20/x
  3. Step 3: Cross multiply
    100,609,047.20x = 150,913,570.80 × 80,453,655.20
  4. Step 4: Simplify right side
    100,609,047.20x = 12,141,548,390,143,990
  5. Step 5: Solve for x
    x = 12,141,548,390,143,990/100,609,047.20
  6. Step 6: Final answer
    x = 120,680,482.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.