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Finding the Fourth Proportional to 85,646.52, 128,472.60 and 29,486.04

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Solution

The fourth proportional to 85,646.52, 128,472.60 and 29,486.04 is: 44,230.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646.52 : 128,472.60 = 29,486.04 : x
  2. Step 2: Convert to fraction form
    85,646.52/128,472.60 = 29,486.04/x
  3. Step 3: Cross multiply
    85,646.52x = 128,472.60 × 29,486.04
  4. Step 4: Simplify right side
    85,646.52x = 3,788,148,222.50
  5. Step 5: Solve for x
    x = 3,788,148,222.50/85,646.52
  6. Step 6: Final answer
    x = 44,230.03

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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.