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Finding the Fourth Proportional to 216,530.10, 324,774.18 and 66,730.16

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Solution

The fourth proportional to 216,530.10, 324,774.18 and 66,730.16 is: 100,088.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,530.10 : 324,774.18 = 66,730.16 : x
  2. Step 2: Convert to fraction form
    216,530.10/324,774.18 = 66,730.16/x
  3. Step 3: Cross multiply
    216,530.10x = 324,774.18 × 66,730.16
  4. Step 4: Simplify right side
    216,530.10x = 21,672,232,995.27
  5. Step 5: Solve for x
    x = 21,672,232,995.27/216,530.10
  6. Step 6: Final answer
    x = 100,088.78

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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.