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Finding the Fourth Proportional to 125,191.17, 172,669.65 and 86,950.77

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Solution

The fourth proportional to 125,191.17, 172,669.65 and 86,950.77 is: 119,926.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,191.17 : 172,669.65 = 86,950.77 : x
  2. Step 2: Convert to fraction form
    125,191.17/172,669.65 = 86,950.77/x
  3. Step 3: Cross multiply
    125,191.17x = 172,669.65 × 86,950.77
  4. Step 4: Simplify right side
    125,191.17x = 15,013,759,023.13
  5. Step 5: Solve for x
    x = 15,013,759,023.13/125,191.17
  6. Step 6: Final answer
    x = 119,926.66

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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.