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Finding the Fourth Proportional to 208,931.59, 313,419.66 and 66,727.18

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Solution

The fourth proportional to 208,931.59, 313,419.66 and 66,727.18 is: 100,097.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,931.59 : 313,419.66 = 66,727.18 : x
  2. Step 2: Convert to fraction form
    208,931.59/313,419.66 = 66,727.18/x
  3. Step 3: Cross multiply
    208,931.59x = 313,419.66 × 66,727.18
  4. Step 4: Simplify right side
    208,931.59x = 20,913,610,068.36
  5. Step 5: Solve for x
    x = 20,913,610,068.36/208,931.59
  6. Step 6: Final answer
    x = 100,097.88

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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.