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Finding the Fourth Proportional to 58,675.40, 87,990.06 and 20,716.57

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Solution

The fourth proportional to 58,675.40, 87,990.06 and 20,716.57 is: 31,066.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,675.40 : 87,990.06 = 20,716.57 : x
  2. Step 2: Convert to fraction form
    58,675.40/87,990.06 = 20,716.57/x
  3. Step 3: Cross multiply
    58,675.40x = 87,990.06 × 20,716.57
  4. Step 4: Simplify right side
    58,675.40x = 1,822,852,237.29
  5. Step 5: Solve for x
    x = 1,822,852,237.29/58,675.40
  6. Step 6: Final answer
    x = 31,066.72

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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.