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Finding the Fourth Proportional to 147,130.60, 220,787.10 and 77,060.20

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Solution

The fourth proportional to 147,130.60, 220,787.10 and 77,060.20 is: 115,638.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,130.60 : 220,787.10 = 77,060.20 : x
  2. Step 2: Convert to fraction form
    147,130.60/220,787.10 = 77,060.20/x
  3. Step 3: Cross multiply
    147,130.60x = 220,787.10 × 77,060.20
  4. Step 4: Simplify right side
    147,130.60x = 17,013,898,083.42
  5. Step 5: Solve for x
    x = 17,013,898,083.42/147,130.60
  6. Step 6: Final answer
    x = 115,638.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.