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Finding the Fourth Proportional to 125,510.40, 187,954.56 and 69,989.76

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Solution

The fourth proportional to 125,510.40, 187,954.56 and 69,989.76 is: 104,811.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,510.40 : 187,954.56 = 69,989.76 : x
  2. Step 2: Convert to fraction form
    125,510.40/187,954.56 = 69,989.76/x
  3. Step 3: Cross multiply
    125,510.40x = 187,954.56 × 69,989.76
  4. Step 4: Simplify right side
    125,510.40x = 13,154,894,545.31
  5. Step 5: Solve for x
    x = 13,154,894,545.31/125,510.40
  6. Step 6: Final answer
    x = 104,811.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.