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Finding the Fourth Proportional to 125,113.47, 172,659.47 and 71,403.49

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Solution

The fourth proportional to 125,113.47, 172,659.47 and 71,403.49 is: 98,538.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,113.47 : 172,659.47 = 71,403.49 : x
  2. Step 2: Convert to fraction form
    125,113.47/172,659.47 = 71,403.49/x
  3. Step 3: Cross multiply
    125,113.47x = 172,659.47 × 71,403.49
  4. Step 4: Simplify right side
    125,113.47x = 12,328,488,739.55
  5. Step 5: Solve for x
    x = 12,328,488,739.55/125,113.47
  6. Step 6: Final answer
    x = 98,538.46

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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.