Home / 90,903.80-136,355.70-51,434.12

Finding the Fourth Proportional to 90,903.80, 136,355.70 and 51,434.12

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Solution

The fourth proportional to 90,903.80, 136,355.70 and 51,434.12 is: 77,151.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,903.80 : 136,355.70 = 51,434.12 : x
  2. Step 2: Convert to fraction form
    90,903.80/136,355.70 = 51,434.12/x
  3. Step 3: Cross multiply
    90,903.80x = 136,355.70 × 51,434.12
  4. Step 4: Simplify right side
    90,903.80x = 7,013,335,436.48
  5. Step 5: Solve for x
    x = 7,013,335,436.48/90,903.80
  6. Step 6: Final answer
    x = 77,151.18

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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.