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Finding the Fourth Proportional to 71,873.51, 99,188.51 and 40,042.40

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Solution

The fourth proportional to 71,873.51, 99,188.51 and 40,042.40 is: 55,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,873.51 : 99,188.51 = 40,042.40 : x
  2. Step 2: Convert to fraction form
    71,873.51/99,188.51 = 40,042.40/x
  3. Step 3: Cross multiply
    71,873.51x = 99,188.51 × 40,042.40
  4. Step 4: Simplify right side
    71,873.51x = 3,971,745,296.67
  5. Step 5: Solve for x
    x = 3,971,745,296.67/71,873.51
  6. Step 6: Final answer
    x = 55,260.21

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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.