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Finding the Fourth Proportional to 90,909.40, 125,396.40 and 58,685.08

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Solution

The fourth proportional to 90,909.40, 125,396.40 and 58,685.08 is: 80,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,909.40 : 125,396.40 = 58,685.08 : x
  2. Step 2: Convert to fraction form
    90,909.40/125,396.40 = 58,685.08/x
  3. Step 3: Cross multiply
    90,909.40x = 125,396.40 × 58,685.08
  4. Step 4: Simplify right side
    90,909.40x = 7,358,897,765.71
  5. Step 5: Solve for x
    x = 7,358,897,765.71/90,909.40
  6. Step 6: Final answer
    x = 80,947.60

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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.