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Finding the Fourth Proportional to 207,991.80, 312,038.10 and 60,247.80

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Solution

The fourth proportional to 207,991.80, 312,038.10 and 60,247.80 is: 90,386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,991.80 : 312,038.10 = 60,247.80 : x
  2. Step 2: Convert to fraction form
    207,991.80/312,038.10 = 60,247.80/x
  3. Step 3: Cross multiply
    207,991.80x = 312,038.10 × 60,247.80
  4. Step 4: Simplify right side
    207,991.80x = 18,799,609,041.18
  5. Step 5: Solve for x
    x = 18,799,609,041.18/207,991.80
  6. Step 6: Final answer
    x = 90,386.30

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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.