Home / 78,543.30-117,775.64-39,122.22

Finding the Fourth Proportional to 78,543.30, 117,775.64 and 39,122.22

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Solution

The fourth proportional to 78,543.30, 117,775.64 and 39,122.22 is: 58,663.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,543.30 : 117,775.64 = 39,122.22 : x
  2. Step 2: Convert to fraction form
    78,543.30/117,775.64 = 39,122.22/x
  3. Step 3: Cross multiply
    78,543.30x = 117,775.64 × 39,122.22
  4. Step 4: Simplify right side
    78,543.30x = 4,607,644,498.72
  5. Step 5: Solve for x
    x = 4,607,644,498.72/78,543.30
  6. Step 6: Final answer
    x = 58,663.75

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1.5x scale

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.