Home / 91,505.39-137,008.40-69,251.45

Finding the Fourth Proportional to 91,505.39, 137,008.40 and 69,251.45

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Solution

The fourth proportional to 91,505.39, 137,008.40 and 69,251.45 is: 103,688.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,505.39 : 137,008.40 = 69,251.45 : x
  2. Step 2: Convert to fraction form
    91,505.39/137,008.40 = 69,251.45/x
  3. Step 3: Cross multiply
    91,505.39x = 137,008.40 × 69,251.45
  4. Step 4: Simplify right side
    91,505.39x = 9,488,029,330.88
  5. Step 5: Solve for x
    x = 9,488,029,330.88/91,505.39
  6. Step 6: Final answer
    x = 103,688.21

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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.