Home / 56,681.88-78,221.45-31,531.38

Finding the Fourth Proportional to 56,681.88, 78,221.45 and 31,531.38

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Solution

The fourth proportional to 56,681.88, 78,221.45 and 31,531.38 is: 43,513.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,681.88 : 78,221.45 = 31,531.38 : x
  2. Step 2: Convert to fraction form
    56,681.88/78,221.45 = 31,531.38/x
  3. Step 3: Cross multiply
    56,681.88x = 78,221.45 × 31,531.38
  4. Step 4: Simplify right side
    56,681.88x = 2,466,430,264.10
  5. Step 5: Solve for x
    x = 2,466,430,264.10/56,681.88
  6. Step 6: Final answer
    x = 43,513.56

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1.5x scale

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.