Home / 72,781.29-100,438.56-40,950.72

Finding the Fourth Proportional to 72,781.29, 100,438.56 and 40,950.72

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Solution

The fourth proportional to 72,781.29, 100,438.56 and 40,950.72 is: 56,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,781.29 : 100,438.56 = 40,950.72 : x
  2. Step 2: Convert to fraction form
    72,781.29/100,438.56 = 40,950.72/x
  3. Step 3: Cross multiply
    72,781.29x = 100,438.56 × 40,950.72
  4. Step 4: Simplify right side
    72,781.29x = 4,113,031,347.76
  5. Step 5: Solve for x
    x = 4,113,031,347.76/72,781.29
  6. Step 6: Final answer
    x = 56,512.21

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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.