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Finding the Fourth Proportional to 99,700.32, 137,576.88 and 54,985.44

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Solution

The fourth proportional to 99,700.32, 137,576.88 and 54,985.44 is: 75,874.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,700.32 : 137,576.88 = 54,985.44 : x
  2. Step 2: Convert to fraction form
    99,700.32/137,576.88 = 54,985.44/x
  3. Step 3: Cross multiply
    99,700.32x = 137,576.88 × 54,985.44
  4. Step 4: Simplify right side
    99,700.32x = 7,564,725,280.63
  5. Step 5: Solve for x
    x = 7,564,725,280.63/99,700.32
  6. Step 6: Final answer
    x = 75,874.63

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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.