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Finding the Fourth Proportional to 99,793.48, 137,738.12 and 65,808.08

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Solution

The fourth proportional to 99,793.48, 137,738.12 and 65,808.08 is: 90,830.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,793.48 : 137,738.12 = 65,808.08 : x
  2. Step 2: Convert to fraction form
    99,793.48/137,738.12 = 65,808.08/x
  3. Step 3: Cross multiply
    99,793.48x = 137,738.12 × 65,808.08
  4. Step 4: Simplify right side
    99,793.48x = 9,064,281,220.01
  5. Step 5: Solve for x
    x = 9,064,281,220.01/99,793.48
  6. Step 6: Final answer
    x = 90,830.40

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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.