Home / 65,721.60-98,582.40-40,680.45

Finding the Fourth Proportional to 65,721.60, 98,582.40 and 40,680.45

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Solution

The fourth proportional to 65,721.60, 98,582.40 and 40,680.45 is: 61,020.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.60 : 98,582.40 = 40,680.45 : x
  2. Step 2: Convert to fraction form
    65,721.60/98,582.40 = 40,680.45/x
  3. Step 3: Cross multiply
    65,721.60x = 98,582.40 × 40,680.45
  4. Step 4: Simplify right side
    65,721.60x = 4,010,376,394.08
  5. Step 5: Solve for x
    x = 4,010,376,394.08/65,721.60
  6. Step 6: Final answer
    x = 61,020.68

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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.