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Finding the Fourth Proportional to 91,373.83, 136,728.59 and 75,430.60

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Solution

The fourth proportional to 91,373.83, 136,728.59 and 75,430.60 is: 112,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,373.83 : 136,728.59 = 75,430.60 : x
  2. Step 2: Convert to fraction form
    91,373.83/136,728.59 = 75,430.60/x
  3. Step 3: Cross multiply
    91,373.83x = 136,728.59 × 75,430.60
  4. Step 4: Simplify right side
    91,373.83x = 10,313,518,520.06
  5. Step 5: Solve for x
    x = 10,313,518,520.06/91,373.83
  6. Step 6: Final answer
    x = 112,871.70

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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.