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Finding the Fourth Proportional to 91,109.80, 125,680.98 and 53,376.76

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Solution

The fourth proportional to 91,109.80, 125,680.98 and 53,376.76 is: 73,630.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,109.80 : 125,680.98 = 53,376.76 : x
  2. Step 2: Convert to fraction form
    91,109.80/125,680.98 = 53,376.76/x
  3. Step 3: Cross multiply
    91,109.80x = 125,680.98 × 53,376.76
  4. Step 4: Simplify right side
    91,109.80x = 6,708,443,506.02
  5. Step 5: Solve for x
    x = 6,708,443,506.02/91,109.80
  6. Step 6: Final answer
    x = 73,630.32

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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.