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Finding the Fourth Proportional to 85,841.37, 128,835.86 and 74,695.91

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Solution

The fourth proportional to 85,841.37, 128,835.86 and 74,695.91 is: 112,108.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,841.37 : 128,835.86 = 74,695.91 : x
  2. Step 2: Convert to fraction form
    85,841.37/128,835.86 = 74,695.91/x
  3. Step 3: Cross multiply
    85,841.37x = 128,835.86 × 74,695.91
  4. Step 4: Simplify right side
    85,841.37x = 9,623,510,785.67
  5. Step 5: Solve for x
    x = 9,623,510,785.67/85,841.37
  6. Step 6: Final answer
    x = 112,108.08

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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.