Home / 142,920.56-197,229.02-78,388.48

Finding the Fourth Proportional to 142,920.56, 197,229.02 and 78,388.48

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Solution

The fourth proportional to 142,920.56, 197,229.02 and 78,388.48 is: 108,175.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,920.56 : 197,229.02 = 78,388.48 : x
  2. Step 2: Convert to fraction form
    142,920.56/197,229.02 = 78,388.48/x
  3. Step 3: Cross multiply
    142,920.56x = 197,229.02 × 78,388.48
  4. Step 4: Simplify right side
    142,920.56x = 15,460,482,055.34
  5. Step 5: Solve for x
    x = 15,460,482,055.34/142,920.56
  6. Step 6: Final answer
    x = 108,175.36

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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.