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Finding the Fourth Proportional to 215,851.20, 297,806.40 and 130,963.20

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Solution

The fourth proportional to 215,851.20, 297,806.40 and 130,963.20 is: 180,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,851.20 : 297,806.40 = 130,963.20 : x
  2. Step 2: Convert to fraction form
    215,851.20/297,806.40 = 130,963.20/x
  3. Step 3: Cross multiply
    215,851.20x = 297,806.40 × 130,963.20
  4. Step 4: Simplify right side
    215,851.20x = 39,001,679,124.48
  5. Step 5: Solve for x
    x = 39,001,679,124.48/215,851.20
  6. Step 6: Final answer
    x = 180,687.80

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1.5x scale

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.