Home / 208,423.40-287,723.47-139,631.32

Finding the Fourth Proportional to 208,423.40, 287,723.47 and 139,631.32

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Solution

The fourth proportional to 208,423.40, 287,723.47 and 139,631.32 is: 192,757.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,423.40 : 287,723.47 = 139,631.32 : x
  2. Step 2: Convert to fraction form
    208,423.40/287,723.47 = 139,631.32/x
  3. Step 3: Cross multiply
    208,423.40x = 287,723.47 × 139,631.32
  4. Step 4: Simplify right side
    208,423.40x = 40,175,206,842.69
  5. Step 5: Solve for x
    x = 40,175,206,842.69/208,423.40
  6. Step 6: Final answer
    x = 192,757.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.