Home / 156,788.60-235,010.10-86,718.20

Finding the Fourth Proportional to 156,788.60, 235,010.10 and 86,718.20

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Solution

The fourth proportional to 156,788.60, 235,010.10 and 86,718.20 is: 129,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,788.60 : 235,010.10 = 86,718.20 : x
  2. Step 2: Convert to fraction form
    156,788.60/235,010.10 = 86,718.20/x
  3. Step 3: Cross multiply
    156,788.60x = 235,010.10 × 86,718.20
  4. Step 4: Simplify right side
    156,788.60x = 20,379,652,853.82
  5. Step 5: Solve for x
    x = 20,379,652,853.82/156,788.60
  6. Step 6: Final answer
    x = 129,981.73

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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.