Home / 429,056.22-643,688.39-129,518.91

Finding the Fourth Proportional to 429,056.22, 643,688.39 and 129,518.91

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Solution

The fourth proportional to 429,056.22, 643,688.39 and 129,518.91 is: 194,309.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,056.22 : 643,688.39 = 129,518.91 : x
  2. Step 2: Convert to fraction form
    429,056.22/643,688.39 = 129,518.91/x
  3. Step 3: Cross multiply
    429,056.22x = 643,688.39 × 129,518.91
  4. Step 4: Simplify right side
    429,056.22x = 83,369,818,652.45
  5. Step 5: Solve for x
    x = 83,369,818,652.45/429,056.22
  6. Step 6: Final answer
    x = 194,309.78

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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.