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Finding the Fourth Proportional to 138,594.28, 191,132.58 and 90,830.28

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Solution

The fourth proportional to 138,594.28, 191,132.58 and 90,830.28 is: 125,262.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,594.28 : 191,132.58 = 90,830.28 : x
  2. Step 2: Convert to fraction form
    138,594.28/191,132.58 = 90,830.28/x
  3. Step 3: Cross multiply
    138,594.28x = 191,132.58 × 90,830.28
  4. Step 4: Simplify right side
    138,594.28x = 17,360,625,758.52
  5. Step 5: Solve for x
    x = 17,360,625,758.52/138,594.28
  6. Step 6: Final answer
    x = 125,262.21

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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.