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Finding the Fourth Proportional to 115,963.76, 160,030.58 and 64,976.58

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Solution

The fourth proportional to 115,963.76, 160,030.58 and 64,976.58 is: 89,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,963.76 : 160,030.58 = 64,976.58 : x
  2. Step 2: Convert to fraction form
    115,963.76/160,030.58 = 64,976.58/x
  3. Step 3: Cross multiply
    115,963.76x = 160,030.58 × 64,976.58
  4. Step 4: Simplify right side
    115,963.76x = 10,398,239,458.93
  5. Step 5: Solve for x
    x = 10,398,239,458.93/115,963.76
  6. Step 6: Final answer
    x = 89,668.01

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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.