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Finding the Fourth Proportional to 73,223.80, 109,835.70 and 72,705.40

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Solution

The fourth proportional to 73,223.80, 109,835.70 and 72,705.40 is: 109,058.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,223.80 : 109,835.70 = 72,705.40 : x
  2. Step 2: Convert to fraction form
    73,223.80/109,835.70 = 72,705.40/x
  3. Step 3: Cross multiply
    73,223.80x = 109,835.70 × 72,705.40
  4. Step 4: Simplify right side
    73,223.80x = 7,985,648,502.78
  5. Step 5: Solve for x
    x = 7,985,648,502.78/73,223.80
  6. Step 6: Final answer
    x = 109,058.10

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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.