Home / 142,154.16-196,171.44-78,490.56

Finding the Fourth Proportional to 142,154.16, 196,171.44 and 78,490.56

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Solution

The fourth proportional to 142,154.16, 196,171.44 and 78,490.56 is: 108,316.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,154.16 : 196,171.44 = 78,490.56 : x
  2. Step 2: Convert to fraction form
    142,154.16/196,171.44 = 78,490.56/x
  3. Step 3: Cross multiply
    142,154.16x = 196,171.44 × 78,490.56
  4. Step 4: Simplify right side
    142,154.16x = 15,397,606,181.61
  5. Step 5: Solve for x
    x = 15,397,606,181.61/142,154.16
  6. Step 6: Final answer
    x = 108,316.25

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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.