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Finding the Fourth Proportional to 123,639.40, 185,459.10 and 71,151.40

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Solution

The fourth proportional to 123,639.40, 185,459.10 and 71,151.40 is: 106,727.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,639.40 : 185,459.10 = 71,151.40 : x
  2. Step 2: Convert to fraction form
    123,639.40/185,459.10 = 71,151.40/x
  3. Step 3: Cross multiply
    123,639.40x = 185,459.10 × 71,151.40
  4. Step 4: Simplify right side
    123,639.40x = 13,195,674,607.74
  5. Step 5: Solve for x
    x = 13,195,674,607.74/123,639.40
  6. Step 6: Final answer
    x = 106,727.10

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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.