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Finding the Fourth Proportional to 117,990.40, 162,828.15 and 64,275.88

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Solution

The fourth proportional to 117,990.40, 162,828.15 and 64,275.88 is: 88,701.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,990.40 : 162,828.15 = 64,275.88 : x
  2. Step 2: Convert to fraction form
    117,990.40/162,828.15 = 64,275.88/x
  3. Step 3: Cross multiply
    117,990.40x = 162,828.15 × 64,275.88
  4. Step 4: Simplify right side
    117,990.40x = 10,465,922,630.02
  5. Step 5: Solve for x
    x = 10,465,922,630.02/117,990.40
  6. Step 6: Final answer
    x = 88,701.48

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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.