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Finding the Fourth Proportional to 99,805.80, 149,708.70 and 64,376.40

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Solution

The fourth proportional to 99,805.80, 149,708.70 and 64,376.40 is: 96,564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.80 : 149,708.70 = 64,376.40 : x
  2. Step 2: Convert to fraction form
    99,805.80/149,708.70 = 64,376.40/x
  3. Step 3: Cross multiply
    99,805.80x = 149,708.70 × 64,376.40
  4. Step 4: Simplify right side
    99,805.80x = 9,637,707,154.68
  5. Step 5: Solve for x
    x = 9,637,707,154.68/99,805.80
  6. Step 6: Final answer
    x = 96,564.60

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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.