Home / 42,138.48-63,070.56-31,040.80

Finding the Fourth Proportional to 42,138.48, 63,070.56 and 31,040.80

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Solution

The fourth proportional to 42,138.48, 63,070.56 and 31,040.80 is: 46,460.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.48 : 63,070.56 = 31,040.80 : x
  2. Step 2: Convert to fraction form
    42,138.48/63,070.56 = 31,040.80/x
  3. Step 3: Cross multiply
    42,138.48x = 63,070.56 × 31,040.80
  4. Step 4: Simplify right side
    42,138.48x = 1,957,760,638.85
  5. Step 5: Solve for x
    x = 1,957,760,638.85/42,138.48
  6. Step 6: Final answer
    x = 46,460.16

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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.