Home / 78,122.33-107,808.77-42,312.33

Finding the Fourth Proportional to 78,122.33, 107,808.77 and 42,312.33

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Solution

The fourth proportional to 78,122.33, 107,808.77 and 42,312.33 is: 58,390.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.33 : 107,808.77 = 42,312.33 : x
  2. Step 2: Convert to fraction form
    78,122.33/107,808.77 = 42,312.33/x
  3. Step 3: Cross multiply
    78,122.33x = 107,808.77 × 42,312.33
  4. Step 4: Simplify right side
    78,122.33x = 4,561,640,253.13
  5. Step 5: Solve for x
    x = 4,561,640,253.13/78,122.33
  6. Step 6: Final answer
    x = 58,390.99

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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.