Home / 142,087.38-213,225.19-78,090.21

Finding the Fourth Proportional to 142,087.38, 213,225.19 and 78,090.21

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Solution

The fourth proportional to 142,087.38, 213,225.19 and 78,090.21 is: 117,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,087.38 : 213,225.19 = 78,090.21 : x
  2. Step 2: Convert to fraction form
    142,087.38/213,225.19 = 78,090.21/x
  3. Step 3: Cross multiply
    142,087.38x = 213,225.19 × 78,090.21
  4. Step 4: Simplify right side
    142,087.38x = 16,650,799,864.39
  5. Step 5: Solve for x
    x = 16,650,799,864.39/142,087.38
  6. Step 6: Final answer
    x = 117,187.04

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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.