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Finding the Fourth Proportional to 115,014.78, 158,709.51 and 64,710.54

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Solution

The fourth proportional to 115,014.78, 158,709.51 and 64,710.54 is: 89,294.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,014.78 : 158,709.51 = 64,710.54 : x
  2. Step 2: Convert to fraction form
    115,014.78/158,709.51 = 64,710.54/x
  3. Step 3: Cross multiply
    115,014.78x = 158,709.51 × 64,710.54
  4. Step 4: Simplify right side
    115,014.78x = 10,270,178,095.24
  5. Step 5: Solve for x
    x = 10,270,178,095.24/115,014.78
  6. Step 6: Final answer
    x = 89,294.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.