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Finding the Fourth Proportional to 74,957.80, 112,371.90 and 45,344.20

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Solution

The fourth proportional to 74,957.80, 112,371.90 and 45,344.20 is: 67,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,957.80 : 112,371.90 = 45,344.20 : x
  2. Step 2: Convert to fraction form
    74,957.80/112,371.90 = 45,344.20/x
  3. Step 3: Cross multiply
    74,957.80x = 112,371.90 × 45,344.20
  4. Step 4: Simplify right side
    74,957.80x = 5,095,413,907.98
  5. Step 5: Solve for x
    x = 5,095,413,907.98/74,957.80
  6. Step 6: Final answer
    x = 67,977.10

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1.5x scale

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.