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Finding the Fourth Proportional to 272,813.80, 409,220.70 and 85,882.60

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Solution

The fourth proportional to 272,813.80, 409,220.70 and 85,882.60 is: 128,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,813.80 : 409,220.70 = 85,882.60 : x
  2. Step 2: Convert to fraction form
    272,813.80/409,220.70 = 85,882.60/x
  3. Step 3: Cross multiply
    272,813.80x = 409,220.70 × 85,882.60
  4. Step 4: Simplify right side
    272,813.80x = 35,144,937,689.82
  5. Step 5: Solve for x
    x = 35,144,937,689.82/272,813.80
  6. Step 6: Final answer
    x = 128,823.90

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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.