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Finding the Fourth Proportional to 272,886.90, 409,330.35 and 85,898.40

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Solution

The fourth proportional to 272,886.90, 409,330.35 and 85,898.40 is: 128,847.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,886.90 : 409,330.35 = 85,898.40 : x
  2. Step 2: Convert to fraction form
    272,886.90/409,330.35 = 85,898.40/x
  3. Step 3: Cross multiply
    272,886.90x = 409,330.35 × 85,898.40
  4. Step 4: Simplify right side
    272,886.90x = 35,160,822,136.44
  5. Step 5: Solve for x
    x = 35,160,822,136.44/272,886.90
  6. Step 6: Final answer
    x = 128,847.60

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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.