Home / 142,921.56-197,230.40-78,389.48

Finding the Fourth Proportional to 142,921.56, 197,230.40 and 78,389.48

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Solution

The fourth proportional to 142,921.56, 197,230.40 and 78,389.48 is: 108,176.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,921.56 : 197,230.40 = 78,389.48 : x
  2. Step 2: Convert to fraction form
    142,921.56/197,230.40 = 78,389.48/x
  3. Step 3: Cross multiply
    142,921.56x = 197,230.40 × 78,389.48
  4. Step 4: Simplify right side
    142,921.56x = 15,460,787,510.04
  5. Step 5: Solve for x
    x = 15,460,787,510.04/142,921.56
  6. Step 6: Final answer
    x = 108,176.74

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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.