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Finding the Fourth Proportional to 72,482.76, 100,024.28 and 39,777.08

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Solution

The fourth proportional to 72,482.76, 100,024.28 and 39,777.08 is: 54,891.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,482.76 : 100,024.28 = 39,777.08 : x
  2. Step 2: Convert to fraction form
    72,482.76/100,024.28 = 39,777.08/x
  3. Step 3: Cross multiply
    72,482.76x = 100,024.28 × 39,777.08
  4. Step 4: Simplify right side
    72,482.76x = 3,978,673,237.66
  5. Step 5: Solve for x
    x = 3,978,673,237.66/72,482.76
  6. Step 6: Final answer
    x = 54,891.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.