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Finding the Fourth Proportional to 272,891.90, 409,337.85 and 85,903.40

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Solution

The fourth proportional to 272,891.90, 409,337.85 and 85,903.40 is: 128,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,891.90 : 409,337.85 = 85,903.40 : x
  2. Step 2: Convert to fraction form
    272,891.90/409,337.85 = 85,903.40/x
  3. Step 3: Cross multiply
    272,891.90x = 409,337.85 × 85,903.40
  4. Step 4: Simplify right side
    272,891.90x = 35,163,513,063.69
  5. Step 5: Solve for x
    x = 35,163,513,063.69/272,891.90
  6. Step 6: Final answer
    x = 128,855.10

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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.