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Finding the Fourth Proportional to 86,712.60, 130,068.90 and 67,029.60

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Solution

The fourth proportional to 86,712.60, 130,068.90 and 67,029.60 is: 100,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,712.60 : 130,068.90 = 67,029.60 : x
  2. Step 2: Convert to fraction form
    86,712.60/130,068.90 = 67,029.60/x
  3. Step 3: Cross multiply
    86,712.60x = 130,068.90 × 67,029.60
  4. Step 4: Simplify right side
    86,712.60x = 8,718,466,339.44
  5. Step 5: Solve for x
    x = 8,718,466,339.44/86,712.60
  6. Step 6: Final answer
    x = 100,544.40

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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.