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Finding the Fourth Proportional to 78,841.30, 118,031.55 and 76,537.30

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Solution

The fourth proportional to 78,841.30, 118,031.55 and 76,537.30 is: 114,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,841.30 : 118,031.55 = 76,537.30 : x
  2. Step 2: Convert to fraction form
    78,841.30/118,031.55 = 76,537.30/x
  3. Step 3: Cross multiply
    78,841.30x = 118,031.55 × 76,537.30
  4. Step 4: Simplify right side
    78,841.30x = 9,033,816,151.82
  5. Step 5: Solve for x
    x = 9,033,816,151.82/78,841.30
  6. Step 6: Final answer
    x = 114,582.28

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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.