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Finding the Fourth Proportional to 85,725.60, 128,588.40 and 22,545.60

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Solution

The fourth proportional to 85,725.60, 128,588.40 and 22,545.60 is: 33,818.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,725.60 : 128,588.40 = 22,545.60 : x
  2. Step 2: Convert to fraction form
    85,725.60/128,588.40 = 22,545.60/x
  3. Step 3: Cross multiply
    85,725.60x = 128,588.40 × 22,545.60
  4. Step 4: Simplify right side
    85,725.60x = 2,899,102,631.04
  5. Step 5: Solve for x
    x = 2,899,102,631.04/85,725.60
  6. Step 6: Final answer
    x = 33,818.40

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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.