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Finding the Fourth Proportional to 99,280.38, 148,836.78 and 43,078.17

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Solution

The fourth proportional to 99,280.38, 148,836.78 and 43,078.17 is: 64,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,280.38 : 148,836.78 = 43,078.17 : x
  2. Step 2: Convert to fraction form
    99,280.38/148,836.78 = 43,078.17/x
  3. Step 3: Cross multiply
    99,280.38x = 148,836.78 × 43,078.17
  4. Step 4: Simplify right side
    99,280.38x = 6,411,616,111.09
  5. Step 5: Solve for x
    x = 6,411,616,111.09/99,280.38
  6. Step 6: Final answer
    x = 64,580.90

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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.