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Finding the Fourth Proportional to 89,387.80, 134,081.70 and 65,768.20

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Solution

The fourth proportional to 89,387.80, 134,081.70 and 65,768.20 is: 98,652.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,387.80 : 134,081.70 = 65,768.20 : x
  2. Step 2: Convert to fraction form
    89,387.80/134,081.70 = 65,768.20/x
  3. Step 3: Cross multiply
    89,387.80x = 134,081.70 × 65,768.20
  4. Step 4: Simplify right side
    89,387.80x = 8,818,312,061.94
  5. Step 5: Solve for x
    x = 8,818,312,061.94/89,387.80
  6. Step 6: Final answer
    x = 98,652.30

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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.