Home / 71,838.72-99,126.40-40,007.68

Finding the Fourth Proportional to 71,838.72, 99,126.40 and 40,007.68

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Solution

The fourth proportional to 71,838.72, 99,126.40 and 40,007.68 is: 55,204.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,838.72 : 99,126.40 = 40,007.68 : x
  2. Step 2: Convert to fraction form
    71,838.72/99,126.40 = 40,007.68/x
  3. Step 3: Cross multiply
    71,838.72x = 99,126.40 × 40,007.68
  4. Step 4: Simplify right side
    71,838.72x = 3,965,817,290.75
  5. Step 5: Solve for x
    x = 3,965,817,290.75/71,838.72
  6. Step 6: Final answer
    x = 55,204.45

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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.