Home / 142,084.40-196,076.08-78,421.76

Finding the Fourth Proportional to 142,084.40, 196,076.08 and 78,421.76

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Solution

The fourth proportional to 142,084.40, 196,076.08 and 78,421.76 is: 108,221.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,084.40 : 196,076.08 = 78,421.76 : x
  2. Step 2: Convert to fraction form
    142,084.40/196,076.08 = 78,421.76/x
  3. Step 3: Cross multiply
    142,084.40x = 196,076.08 × 78,421.76
  4. Step 4: Simplify right side
    142,084.40x = 15,376,631,287.50
  5. Step 5: Solve for x
    x = 15,376,631,287.50/142,084.40
  6. Step 6: Final answer
    x = 108,221.81

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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.