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Finding the Fourth Proportional to 117,987.65, 162,823.40 and 64,272.16

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Solution

The fourth proportional to 117,987.65, 162,823.40 and 64,272.16 is: 88,695.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,987.65 : 162,823.40 = 64,272.16 : x
  2. Step 2: Convert to fraction form
    117,987.65/162,823.40 = 64,272.16/x
  3. Step 3: Cross multiply
    117,987.65x = 162,823.40 × 64,272.16
  4. Step 4: Simplify right side
    117,987.65x = 10,465,011,616.54
  5. Step 5: Solve for x
    x = 10,465,011,616.54/117,987.65
  6. Step 6: Final answer
    x = 88,695.82

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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.