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Finding the Fourth Proportional to 85,575.15, 128,255.81 and 59,068.71

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Solution

The fourth proportional to 85,575.15, 128,255.81 and 59,068.71 is: 88,529.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,575.15 : 128,255.81 = 59,068.71 : x
  2. Step 2: Convert to fraction form
    85,575.15/128,255.81 = 59,068.71/x
  3. Step 3: Cross multiply
    85,575.15x = 128,255.81 × 59,068.71
  4. Step 4: Simplify right side
    85,575.15x = 7,575,904,951.36
  5. Step 5: Solve for x
    x = 7,575,904,951.36/85,575.15
  6. Step 6: Final answer
    x = 88,529.26

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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.