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Finding the Fourth Proportional to 56,020, 77,309.22 and 30,871.12

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Solution

The fourth proportional to 56,020, 77,309.22 and 30,871.12 is: 42,603.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,020 : 77,309.22 = 30,871.12 : x
  2. Step 2: Convert to fraction form
    56,020/77,309.22 = 30,871.12/x
  3. Step 3: Cross multiply
    56,020x = 77,309.22 × 30,871.12
  4. Step 4: Simplify right side
    56,020x = 2,386,622,207.73
  5. Step 5: Solve for x
    x = 2,386,622,207.73/56,020
  6. Step 6: Final answer
    x = 42,603.04

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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.