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Finding the Fourth Proportional to 72,586.53, 99,896.69 and 61,402.76

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Solution

The fourth proportional to 72,586.53, 99,896.69 and 61,402.76 is: 84,505.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,586.53 : 99,896.69 = 61,402.76 : x
  2. Step 2: Convert to fraction form
    72,586.53/99,896.69 = 61,402.76/x
  3. Step 3: Cross multiply
    72,586.53x = 99,896.69 × 61,402.76
  4. Step 4: Simplify right side
    72,586.53x = 6,133,932,509.50
  5. Step 5: Solve for x
    x = 6,133,932,509.50/72,586.53
  6. Step 6: Final answer
    x = 84,505.11

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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.