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Finding the Fourth Proportional to 143,655.12, 215,482.80 and 45,159.12

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Solution

The fourth proportional to 143,655.12, 215,482.80 and 45,159.12 is: 67,738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,655.12 : 215,482.80 = 45,159.12 : x
  2. Step 2: Convert to fraction form
    143,655.12/215,482.80 = 45,159.12/x
  3. Step 3: Cross multiply
    143,655.12x = 215,482.80 × 45,159.12
  4. Step 4: Simplify right side
    143,655.12x = 9,731,013,623.14
  5. Step 5: Solve for x
    x = 9,731,013,623.14/143,655.12
  6. Step 6: Final answer
    x = 67,738.72

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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.