Home / 142,349.40-196,442.10-78,687.18

Finding the Fourth Proportional to 142,349.40, 196,442.10 and 78,687.18

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Solution

The fourth proportional to 142,349.40, 196,442.10 and 78,687.18 is: 108,588.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,349.40 : 196,442.10 = 78,687.18 : x
  2. Step 2: Convert to fraction form
    142,349.40/196,442.10 = 78,687.18/x
  3. Step 3: Cross multiply
    142,349.40x = 196,442.10 × 78,687.18
  4. Step 4: Simplify right side
    142,349.40x = 15,457,474,882.28
  5. Step 5: Solve for x
    x = 15,457,474,882.28/142,349.40
  6. Step 6: Final answer
    x = 108,588.27

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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.