Home / 389,129.78-583,723.47-139,813.94

Finding the Fourth Proportional to 389,129.78, 583,723.47 and 139,813.94

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Solution

The fourth proportional to 389,129.78, 583,723.47 and 139,813.94 is: 209,731.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,129.78 : 583,723.47 = 139,813.94 : x
  2. Step 2: Convert to fraction form
    389,129.78/583,723.47 = 139,813.94/x
  3. Step 3: Cross multiply
    389,129.78x = 583,723.47 × 139,813.94
  4. Step 4: Simplify right side
    389,129.78x = 81,612,678,211.17
  5. Step 5: Solve for x
    x = 81,612,678,211.17/389,129.78
  6. Step 6: Final answer
    x = 209,731.26

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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.