Home / 142,258.78-196,321.08-78,600.70

Finding the Fourth Proportional to 142,258.78, 196,321.08 and 78,600.70

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Solution

The fourth proportional to 142,258.78, 196,321.08 and 78,600.70 is: 108,471.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,258.78 : 196,321.08 = 78,600.70 : x
  2. Step 2: Convert to fraction form
    142,258.78/196,321.08 = 78,600.70/x
  3. Step 3: Cross multiply
    142,258.78x = 196,321.08 × 78,600.70
  4. Step 4: Simplify right side
    142,258.78x = 15,430,974,312.76
  5. Step 5: Solve for x
    x = 15,430,974,312.76/142,258.78
  6. Step 6: Final answer
    x = 108,471.16

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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.