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Finding the Fourth Proportional to 85,646.63, 128,478.51 and 29,479.29

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Solution

The fourth proportional to 85,646.63, 128,478.51 and 29,479.29 is: 44,221.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646.63 : 128,478.51 = 29,479.29 : x
  2. Step 2: Convert to fraction form
    85,646.63/128,478.51 = 29,479.29/x
  3. Step 3: Cross multiply
    85,646.63x = 128,478.51 × 29,479.29
  4. Step 4: Simplify right side
    85,646.63x = 3,787,455,255.06
  5. Step 5: Solve for x
    x = 3,787,455,255.06/85,646.63
  6. Step 6: Final answer
    x = 44,221.89

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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.