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Finding the Fourth Proportional to 125,235.06, 172,842.11 and 77,503.79

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Solution

The fourth proportional to 125,235.06, 172,842.11 and 77,503.79 is: 106,966.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,235.06 : 172,842.11 = 77,503.79 : x
  2. Step 2: Convert to fraction form
    125,235.06/172,842.11 = 77,503.79/x
  3. Step 3: Cross multiply
    125,235.06x = 172,842.11 × 77,503.79
  4. Step 4: Simplify right side
    125,235.06x = 13,395,917,344.87
  5. Step 5: Solve for x
    x = 13,395,917,344.87/125,235.06
  6. Step 6: Final answer
    x = 106,966.19

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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.