Home / 90,831.89-136,269.71-28,502.39

Finding the Fourth Proportional to 90,831.89, 136,269.71 and 28,502.39

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Solution

The fourth proportional to 90,831.89, 136,269.71 and 28,502.39 is: 42,760.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,831.89 : 136,269.71 = 28,502.39 : x
  2. Step 2: Convert to fraction form
    90,831.89/136,269.71 = 28,502.39/x
  3. Step 3: Cross multiply
    90,831.89x = 136,269.71 × 28,502.39
  4. Step 4: Simplify right side
    90,831.89x = 3,884,011,667.00
  5. Step 5: Solve for x
    x = 3,884,011,667.00/90,831.89
  6. Step 6: Final answer
    x = 42,760.44

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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.