Home / 99,136.80-148,705.20-57,146.40

Finding the Fourth Proportional to 99,136.80, 148,705.20 and 57,146.40

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Solution

The fourth proportional to 99,136.80, 148,705.20 and 57,146.40 is: 85,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,136.80 : 148,705.20 = 57,146.40 : x
  2. Step 2: Convert to fraction form
    99,136.80/148,705.20 = 57,146.40/x
  3. Step 3: Cross multiply
    99,136.80x = 148,705.20 × 57,146.40
  4. Step 4: Simplify right side
    99,136.80x = 8,497,966,841.28
  5. Step 5: Solve for x
    x = 8,497,966,841.28/99,136.80
  6. Step 6: Final answer
    x = 85,719.60

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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.