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Finding the Fourth Proportional to 74,916.80, 112,317.60 and 42,084.80

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Solution

The fourth proportional to 74,916.80, 112,317.60 and 42,084.80 is: 63,094.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,916.80 : 112,317.60 = 42,084.80 : x
  2. Step 2: Convert to fraction form
    74,916.80/112,317.60 = 42,084.80/x
  3. Step 3: Cross multiply
    74,916.80x = 112,317.60 × 42,084.80
  4. Step 4: Simplify right side
    74,916.80x = 4,726,863,732.48
  5. Step 5: Solve for x
    x = 4,726,863,732.48/74,916.80
  6. Step 6: Final answer
    x = 63,094.84

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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.