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Finding the Fourth Proportional to 117,990.90, 162,826.64 and 64,275.95

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Solution

The fourth proportional to 117,990.90, 162,826.64 and 64,275.95 is: 88,700.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,990.90 : 162,826.64 = 64,275.95 : x
  2. Step 2: Convert to fraction form
    117,990.90/162,826.64 = 64,275.95/x
  3. Step 3: Cross multiply
    117,990.90x = 162,826.64 × 64,275.95
  4. Step 4: Simplify right side
    117,990.90x = 10,465,836,971.31
  5. Step 5: Solve for x
    x = 10,465,836,971.31/117,990.90
  6. Step 6: Final answer
    x = 88,700.37

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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.