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Finding the Fourth Proportional to 127,129, 175,470.26 and 86,859.04

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Solution

The fourth proportional to 127,129, 175,470.26 and 86,859.04 is: 119,887.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,129 : 175,470.26 = 86,859.04 : x
  2. Step 2: Convert to fraction form
    127,129/175,470.26 = 86,859.04/x
  3. Step 3: Cross multiply
    127,129x = 175,470.26 × 86,859.04
  4. Step 4: Simplify right side
    127,129x = 15,241,178,332.15
  5. Step 5: Solve for x
    x = 15,241,178,332.15/127,129
  6. Step 6: Final answer
    x = 119,887.50

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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.