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Finding the Fourth Proportional to 85,750.61, 128,640.37 and 29,575.69

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Solution

The fourth proportional to 85,750.61, 128,640.37 and 29,575.69 is: 44,368.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,750.61 : 128,640.37 = 29,575.69 : x
  2. Step 2: Convert to fraction form
    85,750.61/128,640.37 = 29,575.69/x
  3. Step 3: Cross multiply
    85,750.61x = 128,640.37 × 29,575.69
  4. Step 4: Simplify right side
    85,750.61x = 3,804,627,061.40
  5. Step 5: Solve for x
    x = 3,804,627,061.40/85,750.61
  6. Step 6: Final answer
    x = 44,368.52

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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.