Home / 98,566.20-147,719.70-87,420.60

Finding the Fourth Proportional to 98,566.20, 147,719.70 and 87,420.60

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Solution

The fourth proportional to 98,566.20, 147,719.70 and 87,420.60 is: 131,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,566.20 : 147,719.70 = 87,420.60 : x
  2. Step 2: Convert to fraction form
    98,566.20/147,719.70 = 87,420.60/x
  3. Step 3: Cross multiply
    98,566.20x = 147,719.70 × 87,420.60
  4. Step 4: Simplify right side
    98,566.20x = 12,913,744,805.82
  5. Step 5: Solve for x
    x = 12,913,744,805.82/98,566.20
  6. Step 6: Final answer
    x = 131,015.95

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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.