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Finding the Fourth Proportional to 86,627.10, 129,940.65 and 86,627.10

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Solution

The fourth proportional to 86,627.10, 129,940.65 and 86,627.10 is: 129,940.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,627.10 : 129,940.65 = 86,627.10 : x
  2. Step 2: Convert to fraction form
    86,627.10/129,940.65 = 86,627.10/x
  3. Step 3: Cross multiply
    86,627.10x = 129,940.65 × 86,627.10
  4. Step 4: Simplify right side
    86,627.10x = 11,256,381,681.62
  5. Step 5: Solve for x
    x = 11,256,381,681.62/86,627.10
  6. Step 6: Final answer
    x = 129,940.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.