Home / 134,972.16-186,261.59-78,387.18

Finding the Fourth Proportional to 134,972.16, 186,261.59 and 78,387.18

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Solution

The fourth proportional to 134,972.16, 186,261.59 and 78,387.18 is: 108,174.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,972.16 : 186,261.59 = 78,387.18 : x
  2. Step 2: Convert to fraction form
    134,972.16/186,261.59 = 78,387.18/x
  3. Step 3: Cross multiply
    134,972.16x = 186,261.59 × 78,387.18
  4. Step 4: Simplify right side
    134,972.16x = 14,600,520,279.90
  5. Step 5: Solve for x
    x = 14,600,520,279.90/134,972.16
  6. Step 6: Final answer
    x = 108,174.31

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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.