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Finding the Fourth Proportional to 72,989.46, 100,752.75 and 56,824.74

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Solution

The fourth proportional to 72,989.46, 100,752.75 and 56,824.74 is: 78,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,989.46 : 100,752.75 = 56,824.74 : x
  2. Step 2: Convert to fraction form
    72,989.46/100,752.75 = 56,824.74/x
  3. Step 3: Cross multiply
    72,989.46x = 100,752.75 × 56,824.74
  4. Step 4: Simplify right side
    72,989.46x = 5,725,248,823.04
  5. Step 5: Solve for x
    x = 5,725,248,823.04/72,989.46
  6. Step 6: Final answer
    x = 78,439.39

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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.