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Finding the Fourth Proportional to 71,578.40, 98,788.97 and 51,501.74

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Solution

The fourth proportional to 71,578.40, 98,788.97 and 51,501.74 is: 71,080.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,578.40 : 98,788.97 = 51,501.74 : x
  2. Step 2: Convert to fraction form
    71,578.40/98,788.97 = 51,501.74/x
  3. Step 3: Cross multiply
    71,578.40x = 98,788.97 × 51,501.74
  4. Step 4: Simplify right side
    71,578.40x = 5,087,803,590.30
  5. Step 5: Solve for x
    x = 5,087,803,590.30/71,578.40
  6. Step 6: Final answer
    x = 71,080.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.