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Finding the Fourth Proportional to 429,113.10, 643,669.65 and 113,601.90

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Solution

The fourth proportional to 429,113.10, 643,669.65 and 113,601.90 is: 170,402.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,113.10 : 643,669.65 = 113,601.90 : x
  2. Step 2: Convert to fraction form
    429,113.10/643,669.65 = 113,601.90/x
  3. Step 3: Cross multiply
    429,113.10x = 643,669.65 × 113,601.90
  4. Step 4: Simplify right side
    429,113.10x = 73,122,095,212.34
  5. Step 5: Solve for x
    x = 73,122,095,212.34/429,113.10
  6. Step 6: Final answer
    x = 170,402.85

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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.