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Finding the Fourth Proportional to 127,043.72, 175,319.13 and 69,681.86

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Solution

The fourth proportional to 127,043.72, 175,319.13 and 69,681.86 is: 96,160.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,043.72 : 175,319.13 = 69,681.86 : x
  2. Step 2: Convert to fraction form
    127,043.72/175,319.13 = 69,681.86/x
  3. Step 3: Cross multiply
    127,043.72x = 175,319.13 × 69,681.86
  4. Step 4: Simplify right side
    127,043.72x = 12,216,563,071.98
  5. Step 5: Solve for x
    x = 12,216,563,071.98/127,043.72
  6. Step 6: Final answer
    x = 96,160.31

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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.