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Finding the Fourth Proportional to 272,684.60, 409,026.90 and 85,695.80

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Solution

The fourth proportional to 272,684.60, 409,026.90 and 85,695.80 is: 128,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,684.60 : 409,026.90 = 85,695.80 : x
  2. Step 2: Convert to fraction form
    272,684.60/409,026.90 = 85,695.80/x
  3. Step 3: Cross multiply
    272,684.60x = 409,026.90 × 85,695.80
  4. Step 4: Simplify right side
    272,684.60x = 35,051,887,417.02
  5. Step 5: Solve for x
    x = 35,051,887,417.02/272,684.60
  6. Step 6: Final answer
    x = 128,543.70

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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.