Home / 100,390.35-138,515.45-60,088.80

Finding the Fourth Proportional to 100,390.35, 138,515.45 and 60,088.80

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Solution

The fourth proportional to 100,390.35, 138,515.45 and 60,088.80 is: 82,908.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,390.35 : 138,515.45 = 60,088.80 : x
  2. Step 2: Convert to fraction form
    100,390.35/138,515.45 = 60,088.80/x
  3. Step 3: Cross multiply
    100,390.35x = 138,515.45 × 60,088.80
  4. Step 4: Simplify right side
    100,390.35x = 8,323,227,171.96
  5. Step 5: Solve for x
    x = 8,323,227,171.96/100,390.35
  6. Step 6: Final answer
    x = 82,908.64

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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.