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Finding the Fourth Proportional to 123,048.40, 184,572.60 and 66,915.40

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Solution

The fourth proportional to 123,048.40, 184,572.60 and 66,915.40 is: 100,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,048.40 : 184,572.60 = 66,915.40 : x
  2. Step 2: Convert to fraction form
    123,048.40/184,572.60 = 66,915.40/x
  3. Step 3: Cross multiply
    123,048.40x = 184,572.60 × 66,915.40
  4. Step 4: Simplify right side
    123,048.40x = 12,350,749,358.04
  5. Step 5: Solve for x
    x = 12,350,749,358.04/123,048.40
  6. Step 6: Final answer
    x = 100,373.10

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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.