Home / 49,987.60-74,981.40-45,905.20

Finding the Fourth Proportional to 49,987.60, 74,981.40 and 45,905.20

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Solution

The fourth proportional to 49,987.60, 74,981.40 and 45,905.20 is: 68,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,987.60 : 74,981.40 = 45,905.20 : x
  2. Step 2: Convert to fraction form
    49,987.60/74,981.40 = 45,905.20/x
  3. Step 3: Cross multiply
    49,987.60x = 74,981.40 × 45,905.20
  4. Step 4: Simplify right side
    49,987.60x = 3,442,036,163.28
  5. Step 5: Solve for x
    x = 3,442,036,163.28/49,987.60
  6. Step 6: Final answer
    x = 68,857.80

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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.