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Finding the Fourth Proportional to 147,893.80, 221,840.70 and 54,387.40

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Solution

The fourth proportional to 147,893.80, 221,840.70 and 54,387.40 is: 81,581.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,893.80 : 221,840.70 = 54,387.40 : x
  2. Step 2: Convert to fraction form
    147,893.80/221,840.70 = 54,387.40/x
  3. Step 3: Cross multiply
    147,893.80x = 221,840.70 × 54,387.40
  4. Step 4: Simplify right side
    147,893.80x = 12,065,338,887.18
  5. Step 5: Solve for x
    x = 12,065,338,887.18/147,893.80
  6. Step 6: Final answer
    x = 81,581.10

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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.