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Finding the Fourth Proportional to 207,043.20, 310,564.80 and 73,987.20

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Solution

The fourth proportional to 207,043.20, 310,564.80 and 73,987.20 is: 110,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,043.20 : 310,564.80 = 73,987.20 : x
  2. Step 2: Convert to fraction form
    207,043.20/310,564.80 = 73,987.20/x
  3. Step 3: Cross multiply
    207,043.20x = 310,564.80 × 73,987.20
  4. Step 4: Simplify right side
    207,043.20x = 22,977,819,970.56
  5. Step 5: Solve for x
    x = 22,977,819,970.56/207,043.20
  6. Step 6: Final answer
    x = 110,980.80

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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.