Home / 142,937.81-197,249.60-78,406.13

Finding the Fourth Proportional to 142,937.81, 197,249.60 and 78,406.13

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Solution

The fourth proportional to 142,937.81, 197,249.60 and 78,406.13 is: 108,197.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,937.81 : 197,249.60 = 78,406.13 : x
  2. Step 2: Convert to fraction form
    142,937.81/197,249.60 = 78,406.13/x
  3. Step 3: Cross multiply
    142,937.81x = 197,249.60 × 78,406.13
  4. Step 4: Simplify right side
    142,937.81x = 15,465,576,401.77
  5. Step 5: Solve for x
    x = 15,465,576,401.77/142,937.81
  6. Step 6: Final answer
    x = 108,197.94

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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.