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Finding the Fourth Proportional to 125,841.18, 173,668.32 and 72,129.68

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Solution

The fourth proportional to 125,841.18, 173,668.32 and 72,129.68 is: 99,543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,841.18 : 173,668.32 = 72,129.68 : x
  2. Step 2: Convert to fraction form
    125,841.18/173,668.32 = 72,129.68/x
  3. Step 3: Cross multiply
    125,841.18x = 173,668.32 × 72,129.68
  4. Step 4: Simplify right side
    125,841.18x = 12,526,640,347.74
  5. Step 5: Solve for x
    x = 12,526,640,347.74/125,841.18
  6. Step 6: Final answer
    x = 99,543.25

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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.