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Finding the Fourth Proportional to 147,763.80, 221,645.70 and 54,257.40

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Solution

The fourth proportional to 147,763.80, 221,645.70 and 54,257.40 is: 81,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,763.80 : 221,645.70 = 54,257.40 : x
  2. Step 2: Convert to fraction form
    147,763.80/221,645.70 = 54,257.40/x
  3. Step 3: Cross multiply
    147,763.80x = 221,645.70 × 54,257.40
  4. Step 4: Simplify right side
    147,763.80x = 12,025,919,403.18
  5. Step 5: Solve for x
    x = 12,025,919,403.18/147,763.80
  6. Step 6: Final answer
    x = 81,386.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.