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Finding the Fourth Proportional to 216,420.76, 324,647.48 and 64,605.87

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Solution

The fourth proportional to 216,420.76, 324,647.48 and 64,605.87 is: 96,913.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,420.76 : 324,647.48 = 64,605.87 : x
  2. Step 2: Convert to fraction form
    216,420.76/324,647.48 = 64,605.87/x
  3. Step 3: Cross multiply
    216,420.76x = 324,647.48 × 64,605.87
  4. Step 4: Simplify right side
    216,420.76x = 20,974,132,888.71
  5. Step 5: Solve for x
    x = 20,974,132,888.71/216,420.76
  6. Step 6: Final answer
    x = 96,913.68

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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.