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Finding the Fourth Proportional to 326,592, 489,969.92 and 93,120

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Solution

The fourth proportional to 326,592, 489,969.92 and 93,120 is: 139,703.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,592 : 489,969.92 = 93,120 : x
  2. Step 2: Convert to fraction form
    326,592/489,969.92 = 93,120/x
  3. Step 3: Cross multiply
    326,592x = 489,969.92 × 93,120
  4. Step 4: Simplify right side
    326,592x = 45,625,998,950.40
  5. Step 5: Solve for x
    x = 45,625,998,950.40/326,592
  6. Step 6: Final answer
    x = 139,703.36

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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.