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Finding the Fourth Proportional to 85,862.15, 128,867.34 and 59,585.34

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Solution

The fourth proportional to 85,862.15, 128,867.34 and 59,585.34 is: 89,429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,862.15 : 128,867.34 = 59,585.34 : x
  2. Step 2: Convert to fraction form
    85,862.15/128,867.34 = 59,585.34/x
  3. Step 3: Cross multiply
    85,862.15x = 128,867.34 × 59,585.34
  4. Step 4: Simplify right side
    85,862.15x = 7,678,604,268.80
  5. Step 5: Solve for x
    x = 7,678,604,268.80/85,862.15
  6. Step 6: Final answer
    x = 89,429.44

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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.