Home / 76,761.18-105,938.19-42,775.20

Finding the Fourth Proportional to 76,761.18, 105,938.19 and 42,775.20

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Solution

The fourth proportional to 76,761.18, 105,938.19 and 42,775.20 is: 59,034.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,761.18 : 105,938.19 = 42,775.20 : x
  2. Step 2: Convert to fraction form
    76,761.18/105,938.19 = 42,775.20/x
  3. Step 3: Cross multiply
    76,761.18x = 105,938.19 × 42,775.20
  4. Step 4: Simplify right side
    76,761.18x = 4,531,527,264.89
  5. Step 5: Solve for x
    x = 4,531,527,264.89/76,761.18
  6. Step 6: Final answer
    x = 59,034.10

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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.