Home / 429,056.35-643,688.57-129,519.03

Finding the Fourth Proportional to 429,056.35, 643,688.57 and 129,519.03

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Solution

The fourth proportional to 429,056.35, 643,688.57 and 129,519.03 is: 194,309.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,056.35 : 643,688.57 = 129,519.03 : x
  2. Step 2: Convert to fraction form
    429,056.35/643,688.57 = 129,519.03/x
  3. Step 3: Cross multiply
    429,056.35x = 643,688.57 × 129,519.03
  4. Step 4: Simplify right side
    429,056.35x = 83,369,921,946.12
  5. Step 5: Solve for x
    x = 83,369,921,946.12/429,056.35
  6. Step 6: Final answer
    x = 194,309.96

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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.