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Finding the Fourth Proportional to 71,721.60, 107,582.40 and 51,907.20

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Solution

The fourth proportional to 71,721.60, 107,582.40 and 51,907.20 is: 77,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,721.60 : 107,582.40 = 51,907.20 : x
  2. Step 2: Convert to fraction form
    71,721.60/107,582.40 = 51,907.20/x
  3. Step 3: Cross multiply
    71,721.60x = 107,582.40 × 51,907.20
  4. Step 4: Simplify right side
    71,721.60x = 5,584,301,153.28
  5. Step 5: Solve for x
    x = 5,584,301,153.28/71,721.60
  6. Step 6: Final answer
    x = 77,860.80

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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.