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Finding the Fourth Proportional to 129,551.40, 178,776.72 and 79,250.40

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Solution

The fourth proportional to 129,551.40, 178,776.72 and 79,250.40 is: 109,362.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,551.40 : 178,776.72 = 79,250.40 : x
  2. Step 2: Convert to fraction form
    129,551.40/178,776.72 = 79,250.40/x
  3. Step 3: Cross multiply
    129,551.40x = 178,776.72 × 79,250.40
  4. Step 4: Simplify right side
    129,551.40x = 14,168,126,570.69
  5. Step 5: Solve for x
    x = 14,168,126,570.69/129,551.40
  6. Step 6: Final answer
    x = 109,362.98

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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.