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Finding the Fourth Proportional to 317,799.68, 476,699.10 and 81,142.40

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Solution

The fourth proportional to 317,799.68, 476,699.10 and 81,142.40 is: 121,713.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,799.68 : 476,699.10 = 81,142.40 : x
  2. Step 2: Convert to fraction form
    317,799.68/476,699.10 = 81,142.40/x
  3. Step 3: Cross multiply
    317,799.68x = 476,699.10 × 81,142.40
  4. Step 4: Simplify right side
    317,799.68x = 38,680,509,051.84
  5. Step 5: Solve for x
    x = 38,680,509,051.84/317,799.68
  6. Step 6: Final answer
    x = 121,713.49

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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.