Home / 78,512.61-108,347.91-42,702.89

Finding the Fourth Proportional to 78,512.61, 108,347.91 and 42,702.89

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Solution

The fourth proportional to 78,512.61, 108,347.91 and 42,702.89 is: 58,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,512.61 : 108,347.91 = 42,702.89 : x
  2. Step 2: Convert to fraction form
    78,512.61/108,347.91 = 42,702.89/x
  3. Step 3: Cross multiply
    78,512.61x = 108,347.91 × 42,702.89
  4. Step 4: Simplify right side
    78,512.61x = 4,626,768,340.72
  5. Step 5: Solve for x
    x = 4,626,768,340.72/78,512.61
  6. Step 6: Final answer
    x = 58,930.26

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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.