Home / 72,543.65-100,113.35-40,278.26

Finding the Fourth Proportional to 72,543.65, 100,113.35 and 40,278.26

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Solution

The fourth proportional to 72,543.65, 100,113.35 and 40,278.26 is: 55,585.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,543.65 : 100,113.35 = 40,278.26 : x
  2. Step 2: Convert to fraction form
    72,543.65/100,113.35 = 40,278.26/x
  3. Step 3: Cross multiply
    72,543.65x = 100,113.35 × 40,278.26
  4. Step 4: Simplify right side
    72,543.65x = 4,032,391,891.75
  5. Step 5: Solve for x
    x = 4,032,391,891.75/72,543.65
  6. Step 6: Final answer
    x = 55,585.74

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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.