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Finding the Fourth Proportional to 125,681.38, 173,430 and 73,990.27

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Solution

The fourth proportional to 125,681.38, 173,430 and 73,990.27 is: 102,100.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,681.38 : 173,430 = 73,990.27 : x
  2. Step 2: Convert to fraction form
    125,681.38/173,430 = 73,990.27/x
  3. Step 3: Cross multiply
    125,681.38x = 173,430 × 73,990.27
  4. Step 4: Simplify right side
    125,681.38x = 12,832,132,742.89
  5. Step 5: Solve for x
    x = 12,832,132,742.89/125,681.38
  6. Step 6: Final answer
    x = 102,100.51

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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.