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Finding the Fourth Proportional to 72,143.97, 99,586.46 and 64,576.95

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Solution

The fourth proportional to 72,143.97, 99,586.46 and 64,576.95 is: 89,141.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.97 : 99,586.46 = 64,576.95 : x
  2. Step 2: Convert to fraction form
    72,143.97/99,586.46 = 64,576.95/x
  3. Step 3: Cross multiply
    72,143.97x = 99,586.46 × 64,576.95
  4. Step 4: Simplify right side
    72,143.97x = 6,430,989,636.09
  5. Step 5: Solve for x
    x = 6,430,989,636.09/72,143.97
  6. Step 6: Final answer
    x = 89,141.06

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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.