Home / 142,011.91-195,977.10-78,349.69

Finding the Fourth Proportional to 142,011.91, 195,977.10 and 78,349.69

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Solution

The fourth proportional to 142,011.91, 195,977.10 and 78,349.69 is: 108,122.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,011.91 : 195,977.10 = 78,349.69 : x
  2. Step 2: Convert to fraction form
    142,011.91/195,977.10 = 78,349.69/x
  3. Step 3: Cross multiply
    142,011.91x = 195,977.10 × 78,349.69
  4. Step 4: Simplify right side
    142,011.91x = 15,354,745,032.10
  5. Step 5: Solve for x
    x = 15,354,745,032.10/142,011.91
  6. Step 6: Final answer
    x = 108,122.94

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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.