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Finding the Fourth Proportional to 243,390.40, 365,020.80 and 74,910.40

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Solution

The fourth proportional to 243,390.40, 365,020.80 and 74,910.40 is: 112,345.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,390.40 : 365,020.80 = 74,910.40 : x
  2. Step 2: Convert to fraction form
    243,390.40/365,020.80 = 74,910.40/x
  3. Step 3: Cross multiply
    243,390.40x = 365,020.80 × 74,910.40
  4. Step 4: Simplify right side
    243,390.40x = 27,343,854,136.32
  5. Step 5: Solve for x
    x = 27,343,854,136.32/243,390.40
  6. Step 6: Final answer
    x = 112,345.66

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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.