Home / 156,619.40-216,023.12-143,740.17

Finding the Fourth Proportional to 156,619.40, 216,023.12 and 143,740.17

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Solution

The fourth proportional to 156,619.40, 216,023.12 and 143,740.17 is: 198,258.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,619.40 : 216,023.12 = 143,740.17 : x
  2. Step 2: Convert to fraction form
    156,619.40/216,023.12 = 143,740.17/x
  3. Step 3: Cross multiply
    156,619.40x = 216,023.12 × 143,740.17
  4. Step 4: Simplify right side
    156,619.40x = 31,051,199,274.03
  5. Step 5: Solve for x
    x = 31,051,199,274.03/156,619.40
  6. Step 6: Final answer
    x = 198,258.97

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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.