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Finding the Fourth Proportional to 58,471.87, 87,707.60 and 21,031.88

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Solution

The fourth proportional to 58,471.87, 87,707.60 and 21,031.88 is: 31,547.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,471.87 : 87,707.60 = 21,031.88 : x
  2. Step 2: Convert to fraction form
    58,471.87/87,707.60 = 21,031.88/x
  3. Step 3: Cross multiply
    58,471.87x = 87,707.60 × 21,031.88
  4. Step 4: Simplify right side
    58,471.87x = 1,844,655,718.29
  5. Step 5: Solve for x
    x = 1,844,655,718.29/58,471.87
  6. Step 6: Final answer
    x = 31,547.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.