Home / 76,129.16-105,058.40-42,139.96

Finding the Fourth Proportional to 76,129.16, 105,058.40 and 42,139.96

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Solution

The fourth proportional to 76,129.16, 105,058.40 and 42,139.96 is: 58,153.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,129.16 : 105,058.40 = 42,139.96 : x
  2. Step 2: Convert to fraction form
    76,129.16/105,058.40 = 42,139.96/x
  3. Step 3: Cross multiply
    76,129.16x = 105,058.40 × 42,139.96
  4. Step 4: Simplify right side
    76,129.16x = 4,427,156,773.66
  5. Step 5: Solve for x
    x = 4,427,156,773.66/76,129.16
  6. Step 6: Final answer
    x = 58,153.23

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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.