Home / 71,913.28-99,242.40-40,086.40

Finding the Fourth Proportional to 71,913.28, 99,242.40 and 40,086.40

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Solution

The fourth proportional to 71,913.28, 99,242.40 and 40,086.40 is: 55,320.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,913.28 : 99,242.40 = 40,086.40 : x
  2. Step 2: Convert to fraction form
    71,913.28/99,242.40 = 40,086.40/x
  3. Step 3: Cross multiply
    71,913.28x = 99,242.40 × 40,086.40
  4. Step 4: Simplify right side
    71,913.28x = 3,978,270,543.36
  5. Step 5: Solve for x
    x = 3,978,270,543.36/71,913.28
  6. Step 6: Final answer
    x = 55,320.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.