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Finding the Fourth Proportional to 85,675.29, 128,509.29 and 23,345.79

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Solution

The fourth proportional to 85,675.29, 128,509.29 and 23,345.79 is: 35,017.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,675.29 : 128,509.29 = 23,345.79 : x
  2. Step 2: Convert to fraction form
    85,675.29/128,509.29 = 23,345.79/x
  3. Step 3: Cross multiply
    85,675.29x = 128,509.29 × 23,345.79
  4. Step 4: Simplify right side
    85,675.29x = 3,000,150,897.39
  5. Step 5: Solve for x
    x = 3,000,150,897.39/85,675.29
  6. Step 6: Final answer
    x = 35,017.69

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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.