Home / 138,787.02-191,515.59-78,349.28

Finding the Fourth Proportional to 138,787.02, 191,515.59 and 78,349.28

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Solution

The fourth proportional to 138,787.02, 191,515.59 and 78,349.28 is: 108,116.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,787.02 : 191,515.59 = 78,349.28 : x
  2. Step 2: Convert to fraction form
    138,787.02/191,515.59 = 78,349.28/x
  3. Step 3: Cross multiply
    138,787.02x = 191,515.59 × 78,349.28
  4. Step 4: Simplify right side
    138,787.02x = 15,005,107,627.70
  5. Step 5: Solve for x
    x = 15,005,107,627.70/138,787.02
  6. Step 6: Final answer
    x = 108,116.07

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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.