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Finding the Fourth Proportional to 91,269.60, 136,635.60 and 67,999.20

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Solution

The fourth proportional to 91,269.60, 136,635.60 and 67,999.20 is: 101,798.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,269.60 : 136,635.60 = 67,999.20 : x
  2. Step 2: Convert to fraction form
    91,269.60/136,635.60 = 67,999.20/x
  3. Step 3: Cross multiply
    91,269.60x = 136,635.60 × 67,999.20
  4. Step 4: Simplify right side
    91,269.60x = 9,291,111,491.52
  5. Step 5: Solve for x
    x = 9,291,111,491.52/91,269.60
  6. Step 6: Final answer
    x = 101,798.53

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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.