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Finding the Fourth Proportional to 72,522.74, 100,155.49 and 49,920.10

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Solution

The fourth proportional to 72,522.74, 100,155.49 and 49,920.10 is: 68,940.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,522.74 : 100,155.49 = 49,920.10 : x
  2. Step 2: Convert to fraction form
    72,522.74/100,155.49 = 49,920.10/x
  3. Step 3: Cross multiply
    72,522.74x = 100,155.49 × 49,920.10
  4. Step 4: Simplify right side
    72,522.74x = 4,999,771,701.16
  5. Step 5: Solve for x
    x = 4,999,771,701.16/72,522.74
  6. Step 6: Final answer
    x = 68,940.74

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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.