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Finding the Fourth Proportional to 124,390.78, 171,655.59 and 70,680.70

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Solution

The fourth proportional to 124,390.78, 171,655.59 and 70,680.70 is: 97,537.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,390.78 : 171,655.59 = 70,680.70 : x
  2. Step 2: Convert to fraction form
    124,390.78/171,655.59 = 70,680.70/x
  3. Step 3: Cross multiply
    124,390.78x = 171,655.59 × 70,680.70
  4. Step 4: Simplify right side
    124,390.78x = 12,132,737,260.11
  5. Step 5: Solve for x
    x = 12,132,737,260.11/124,390.78
  6. Step 6: Final answer
    x = 97,537.27

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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.