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Finding the Fourth Proportional to 74,687.95, 112,064.87 and 39,619

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Solution

The fourth proportional to 74,687.95, 112,064.87 and 39,619 is: 59,445.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,687.95 : 112,064.87 = 39,619 : x
  2. Step 2: Convert to fraction form
    74,687.95/112,064.87 = 39,619/x
  3. Step 3: Cross multiply
    74,687.95x = 112,064.87 × 39,619
  4. Step 4: Simplify right side
    74,687.95x = 4,439,898,084.53
  5. Step 5: Solve for x
    x = 4,439,898,084.53/74,687.95
  6. Step 6: Final answer
    x = 59,445.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.