Home / 142,091.40-196,085.76-78,428.76

Finding the Fourth Proportional to 142,091.40, 196,085.76 and 78,428.76

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Solution

The fourth proportional to 142,091.40, 196,085.76 and 78,428.76 is: 108,231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,091.40 : 196,085.76 = 78,428.76 : x
  2. Step 2: Convert to fraction form
    142,091.40/196,085.76 = 78,428.76/x
  3. Step 3: Cross multiply
    142,091.40x = 196,085.76 × 78,428.76
  4. Step 4: Simplify right side
    142,091.40x = 15,378,763,010.46
  5. Step 5: Solve for x
    x = 15,378,763,010.46/142,091.40
  6. Step 6: Final answer
    x = 108,231.48

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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.