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Finding the Fourth Proportional to 142,672.88, 196,886.12 and 79,009.32

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Solution

The fourth proportional to 142,672.88, 196,886.12 and 79,009.32 is: 109,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,672.88 : 196,886.12 = 79,009.32 : x
  2. Step 2: Convert to fraction form
    142,672.88/196,886.12 = 79,009.32/x
  3. Step 3: Cross multiply
    142,672.88x = 196,886.12 × 79,009.32
  4. Step 4: Simplify right side
    142,672.88x = 15,555,838,458.64
  5. Step 5: Solve for x
    x = 15,555,838,458.64/142,672.88
  6. Step 6: Final answer
    x = 109,031.50

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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.