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Finding the Fourth Proportional to 125,397.84, 188,089.78 and 91,698.40

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Solution

The fourth proportional to 125,397.84, 188,089.78 and 91,698.40 is: 137,542.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,397.84 : 188,089.78 = 91,698.40 : x
  2. Step 2: Convert to fraction form
    125,397.84/188,089.78 = 91,698.40/x
  3. Step 3: Cross multiply
    125,397.84x = 188,089.78 × 91,698.40
  4. Step 4: Simplify right side
    125,397.84x = 17,247,531,882.35
  5. Step 5: Solve for x
    x = 17,247,531,882.35/125,397.84
  6. Step 6: Final answer
    x = 137,542.50

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1.5x scale

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.