Home / 142,356.66-196,442.30-78,689.45

Finding the Fourth Proportional to 142,356.66, 196,442.30 and 78,689.45

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Solution

The fourth proportional to 142,356.66, 196,442.30 and 78,689.45 is: 108,585.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,356.66 : 196,442.30 = 78,689.45 : x
  2. Step 2: Convert to fraction form
    142,356.66/196,442.30 = 78,689.45/x
  3. Step 3: Cross multiply
    142,356.66x = 196,442.30 × 78,689.45
  4. Step 4: Simplify right side
    142,356.66x = 15,457,935,168.08
  5. Step 5: Solve for x
    x = 15,457,935,168.08/142,356.66
  6. Step 6: Final answer
    x = 108,585.96

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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.