Home / 90,686.40-125,127.90-54,869.28

Finding the Fourth Proportional to 90,686.40, 125,127.90 and 54,869.28

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Solution

The fourth proportional to 90,686.40, 125,127.90 and 54,869.28 is: 75,707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,686.40 : 125,127.90 = 54,869.28 : x
  2. Step 2: Convert to fraction form
    90,686.40/125,127.90 = 54,869.28/x
  3. Step 3: Cross multiply
    90,686.40x = 125,127.90 × 54,869.28
  4. Step 4: Simplify right side
    90,686.40x = 6,865,677,780.91
  5. Step 5: Solve for x
    x = 6,865,677,780.91/90,686.40
  6. Step 6: Final answer
    x = 75,707.91

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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.