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Finding the Fourth Proportional to 91,373.70, 136,728.41 and 75,430.47

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Solution

The fourth proportional to 91,373.70, 136,728.41 and 75,430.47 is: 112,871.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,373.70 : 136,728.41 = 75,430.47 : x
  2. Step 2: Convert to fraction form
    91,373.70/136,728.41 = 75,430.47/x
  3. Step 3: Cross multiply
    91,373.70x = 136,728.41 × 75,430.47
  4. Step 4: Simplify right side
    91,373.70x = 10,313,488,364.23
  5. Step 5: Solve for x
    x = 10,313,488,364.23/91,373.70
  6. Step 6: Final answer
    x = 112,871.51

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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.