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Finding the Fourth Proportional to 163,235.66, 225,266.16 and 90,639.57

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Solution

The fourth proportional to 163,235.66, 225,266.16 and 90,639.57 is: 125,083.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,235.66 : 225,266.16 = 90,639.57 : x
  2. Step 2: Convert to fraction form
    163,235.66/225,266.16 = 90,639.57/x
  3. Step 3: Cross multiply
    163,235.66x = 225,266.16 × 90,639.57
  4. Step 4: Simplify right side
    163,235.66x = 20,418,027,877.95
  5. Step 5: Solve for x
    x = 20,418,027,877.95/163,235.66
  6. Step 6: Final answer
    x = 125,083.14

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1.5x scale

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.