Home / 142,809.64-197,070.18-79,146.88

Finding the Fourth Proportional to 142,809.64, 197,070.18 and 79,146.88

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Solution

The fourth proportional to 142,809.64, 197,070.18 and 79,146.88 is: 109,218.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,809.64 : 197,070.18 = 79,146.88 : x
  2. Step 2: Convert to fraction form
    142,809.64/197,070.18 = 79,146.88/x
  3. Step 3: Cross multiply
    142,809.64x = 197,070.18 × 79,146.88
  4. Step 4: Simplify right side
    142,809.64x = 15,597,489,888.04
  5. Step 5: Solve for x
    x = 15,597,489,888.04/142,809.64
  6. Step 6: Final answer
    x = 109,218.75

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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.