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Finding the Fourth Proportional to 129,912.32, 179,278.72 and 70,296.32

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Solution

The fourth proportional to 129,912.32, 179,278.72 and 70,296.32 is: 97,008.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,912.32 : 179,278.72 = 70,296.32 : x
  2. Step 2: Convert to fraction form
    129,912.32/179,278.72 = 70,296.32/x
  3. Step 3: Cross multiply
    129,912.32x = 179,278.72 × 70,296.32
  4. Step 4: Simplify right side
    129,912.32x = 12,602,634,270.31
  5. Step 5: Solve for x
    x = 12,602,634,270.31/129,912.32
  6. Step 6: Final answer
    x = 97,008.77

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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.