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Finding the Fourth Proportional to 345,530.64, 518,111.28 and 108,809.76

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Solution

The fourth proportional to 345,530.64, 518,111.28 and 108,809.76 is: 163,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,530.64 : 518,111.28 = 108,809.76 : x
  2. Step 2: Convert to fraction form
    345,530.64/518,111.28 = 108,809.76/x
  3. Step 3: Cross multiply
    345,530.64x = 518,111.28 × 108,809.76
  4. Step 4: Simplify right side
    345,530.64x = 56,375,564,030.09
  5. Step 5: Solve for x
    x = 56,375,564,030.09/345,530.64
  6. Step 6: Final answer
    x = 163,156.48

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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.