Home / 100,122.04-138,199.16-57,708.80

Finding the Fourth Proportional to 100,122.04, 138,199.16 and 57,708.80

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Solution

The fourth proportional to 100,122.04, 138,199.16 and 57,708.80 is: 79,655.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,122.04 : 138,199.16 = 57,708.80 : x
  2. Step 2: Convert to fraction form
    100,122.04/138,199.16 = 57,708.80/x
  3. Step 3: Cross multiply
    100,122.04x = 138,199.16 × 57,708.80
  4. Step 4: Simplify right side
    100,122.04x = 7,975,307,684.61
  5. Step 5: Solve for x
    x = 7,975,307,684.61/100,122.04
  6. Step 6: Final answer
    x = 79,655.86

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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.