Home / 142,119.23-196,123.33-78,455.66

Finding the Fourth Proportional to 142,119.23, 196,123.33 and 78,455.66

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Solution

The fourth proportional to 142,119.23, 196,123.33 and 78,455.66 is: 108,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,119.23 : 196,123.33 = 78,455.66 : x
  2. Step 2: Convert to fraction form
    142,119.23/196,123.33 = 78,455.66/x
  3. Step 3: Cross multiply
    142,119.23x = 196,123.33 × 78,455.66
  4. Step 4: Simplify right side
    142,119.23x = 15,386,985,296.55
  5. Step 5: Solve for x
    x = 15,386,985,296.55/142,119.23
  6. Step 6: Final answer
    x = 108,268.14

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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.