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Finding the Fourth Proportional to 85,749.60, 128,638.87 and 29,574.69

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Solution

The fourth proportional to 85,749.60, 128,638.87 and 29,574.69 is: 44,367.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.60 : 128,638.87 = 29,574.69 : x
  2. Step 2: Convert to fraction form
    85,749.60/128,638.87 = 29,574.69/x
  3. Step 3: Cross multiply
    85,749.60x = 128,638.87 × 29,574.69
  4. Step 4: Simplify right side
    85,749.60x = 3,804,454,256.77
  5. Step 5: Solve for x
    x = 3,804,454,256.77/85,749.60
  6. Step 6: Final answer
    x = 44,367.02

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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.