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Finding the Fourth Proportional to 118,689.60, 163,868.04 and 105,920.85

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Solution

The fourth proportional to 118,689.60, 163,868.04 and 105,920.85 is: 146,238.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,689.60 : 163,868.04 = 105,920.85 : x
  2. Step 2: Convert to fraction form
    118,689.60/163,868.04 = 105,920.85/x
  3. Step 3: Cross multiply
    118,689.60x = 163,868.04 × 105,920.85
  4. Step 4: Simplify right side
    118,689.60x = 17,357,042,084.63
  5. Step 5: Solve for x
    x = 17,357,042,084.63/118,689.60
  6. Step 6: Final answer
    x = 146,238.95

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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.