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Finding the Fourth Proportional to 99,638.91, 137,497.64 and 54,315.90

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Solution

The fourth proportional to 99,638.91, 137,497.64 and 54,315.90 is: 74,953.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,638.91 : 137,497.64 = 54,315.90 : x
  2. Step 2: Convert to fraction form
    99,638.91/137,497.64 = 54,315.90/x
  3. Step 3: Cross multiply
    99,638.91x = 137,497.64 × 54,315.90
  4. Step 4: Simplify right side
    99,638.91x = 7,468,307,792.90
  5. Step 5: Solve for x
    x = 7,468,307,792.90/99,638.91
  6. Step 6: Final answer
    x = 74,953.73

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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.