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Finding the Fourth Proportional to 160,728.40, 221,810.43 and 89,115.07

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Solution

The fourth proportional to 160,728.40, 221,810.43 and 89,115.07 is: 122,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,728.40 : 221,810.43 = 89,115.07 : x
  2. Step 2: Convert to fraction form
    160,728.40/221,810.43 = 89,115.07/x
  3. Step 3: Cross multiply
    160,728.40x = 221,810.43 × 89,115.07
  4. Step 4: Simplify right side
    160,728.40x = 19,766,651,996.18
  5. Step 5: Solve for x
    x = 19,766,651,996.18/160,728.40
  6. Step 6: Final answer
    x = 122,981.70

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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.