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Finding the Fourth Proportional to 74,958.80, 112,373.40 and 45,345.20

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Solution

The fourth proportional to 74,958.80, 112,373.40 and 45,345.20 is: 67,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,958.80 : 112,373.40 = 45,345.20 : x
  2. Step 2: Convert to fraction form
    74,958.80/112,373.40 = 45,345.20/x
  3. Step 3: Cross multiply
    74,958.80x = 112,373.40 × 45,345.20
  4. Step 4: Simplify right side
    74,958.80x = 5,095,594,297.68
  5. Step 5: Solve for x
    x = 5,095,594,297.68/74,958.80
  6. Step 6: Final answer
    x = 67,978.60

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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.