Home / 142,520.10-196,669.51-78,854.10

Finding the Fourth Proportional to 142,520.10, 196,669.51 and 78,854.10

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Solution

The fourth proportional to 142,520.10, 196,669.51 and 78,854.10 is: 108,814.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,520.10 : 196,669.51 = 78,854.10 : x
  2. Step 2: Convert to fraction form
    142,520.10/196,669.51 = 78,854.10/x
  3. Step 3: Cross multiply
    142,520.10x = 196,669.51 × 78,854.10
  4. Step 4: Simplify right side
    142,520.10x = 15,508,197,208.49
  5. Step 5: Solve for x
    x = 15,508,197,208.49/142,520.10
  6. Step 6: Final answer
    x = 108,814.11

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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.