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Finding the Fourth Proportional to 74,799.75, 112,715.72 and 67,779.48

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Solution

The fourth proportional to 74,799.75, 112,715.72 and 67,779.48 is: 102,136.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,799.75 : 112,715.72 = 67,779.48 : x
  2. Step 2: Convert to fraction form
    74,799.75/112,715.72 = 67,779.48/x
  3. Step 3: Cross multiply
    74,799.75x = 112,715.72 × 67,779.48
  4. Step 4: Simplify right side
    74,799.75x = 7,639,812,550.53
  5. Step 5: Solve for x
    x = 7,639,812,550.53/74,799.75
  6. Step 6: Final answer
    x = 102,136.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.