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Finding the Fourth Proportional to 113,856.60, 170,784.90 and 87,612.60

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Solution

The fourth proportional to 113,856.60, 170,784.90 and 87,612.60 is: 131,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,856.60 : 170,784.90 = 87,612.60 : x
  2. Step 2: Convert to fraction form
    113,856.60/170,784.90 = 87,612.60/x
  3. Step 3: Cross multiply
    113,856.60x = 170,784.90 × 87,612.60
  4. Step 4: Simplify right side
    113,856.60x = 14,962,909,129.74
  5. Step 5: Solve for x
    x = 14,962,909,129.74/113,856.60
  6. Step 6: Final answer
    x = 131,418.90

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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.