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Finding the Fourth Proportional to 429,699.11, 644,615.51 and 130,108.35

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Solution

The fourth proportional to 429,699.11, 644,615.51 and 130,108.35 is: 195,182.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,699.11 : 644,615.51 = 130,108.35 : x
  2. Step 2: Convert to fraction form
    429,699.11/644,615.51 = 130,108.35/x
  3. Step 3: Cross multiply
    429,699.11x = 644,615.51 × 130,108.35
  4. Step 4: Simplify right side
    429,699.11x = 83,869,859,739.97
  5. Step 5: Solve for x
    x = 83,869,859,739.97/429,699.11
  6. Step 6: Final answer
    x = 195,182.77

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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.