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Finding the Fourth Proportional to 72,099.61, 99,544.26 and 64,532.80

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Solution

The fourth proportional to 72,099.61, 99,544.26 and 64,532.80 is: 89,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,099.61 : 99,544.26 = 64,532.80 : x
  2. Step 2: Convert to fraction form
    72,099.61/99,544.26 = 64,532.80/x
  3. Step 3: Cross multiply
    72,099.61x = 99,544.26 × 64,532.80
  4. Step 4: Simplify right side
    72,099.61x = 6,423,869,821.73
  5. Step 5: Solve for x
    x = 6,423,869,821.73/72,099.61
  6. Step 6: Final answer
    x = 89,097.15

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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.