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Finding the Fourth Proportional to 160,641.20, 221,686.16 and 89,022.40

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Solution

The fourth proportional to 160,641.20, 221,686.16 and 89,022.40 is: 122,851.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,641.20 : 221,686.16 = 89,022.40 : x
  2. Step 2: Convert to fraction form
    160,641.20/221,686.16 = 89,022.40/x
  3. Step 3: Cross multiply
    160,641.20x = 221,686.16 × 89,022.40
  4. Step 4: Simplify right side
    160,641.20x = 19,735,034,009.98
  5. Step 5: Solve for x
    x = 19,735,034,009.98/160,641.20
  6. Step 6: Final answer
    x = 122,851.63

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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.