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Finding the Fourth Proportional to 243,521.40, 365,339.70 and 77,309.40

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Solution

The fourth proportional to 243,521.40, 365,339.70 and 77,309.40 is: 115,982.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,521.40 : 365,339.70 = 77,309.40 : x
  2. Step 2: Convert to fraction form
    243,521.40/365,339.70 = 77,309.40/x
  3. Step 3: Cross multiply
    243,521.40x = 365,339.70 × 77,309.40
  4. Step 4: Simplify right side
    243,521.40x = 28,244,193,003.18
  5. Step 5: Solve for x
    x = 28,244,193,003.18/243,521.40
  6. Step 6: Final answer
    x = 115,982.39

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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.