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Finding the Fourth Proportional to 208,088.20, 312,132.30 and 74,972.80

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Solution

The fourth proportional to 208,088.20, 312,132.30 and 74,972.80 is: 112,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,088.20 : 312,132.30 = 74,972.80 : x
  2. Step 2: Convert to fraction form
    208,088.20/312,132.30 = 74,972.80/x
  3. Step 3: Cross multiply
    208,088.20x = 312,132.30 × 74,972.80
  4. Step 4: Simplify right side
    208,088.20x = 23,401,432,501.44
  5. Step 5: Solve for x
    x = 23,401,432,501.44/208,088.20
  6. Step 6: Final answer
    x = 112,459.20

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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.