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Finding the Fourth Proportional to 160,486.65, 221,702.25 and 128,178.84

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Solution

The fourth proportional to 160,486.65, 221,702.25 and 128,178.84 is: 177,071.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,486.65 : 221,702.25 = 128,178.84 : x
  2. Step 2: Convert to fraction form
    160,486.65/221,702.25 = 128,178.84/x
  3. Step 3: Cross multiply
    160,486.65x = 221,702.25 × 128,178.84
  4. Step 4: Simplify right side
    160,486.65x = 28,417,537,230.39
  5. Step 5: Solve for x
    x = 28,417,537,230.39/160,486.65
  6. Step 6: Final answer
    x = 177,071.04

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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.