Home / 208,316.30-312,490.65-68,089.10

Finding the Fourth Proportional to 208,316.30, 312,490.65 and 68,089.10

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Solution

The fourth proportional to 208,316.30, 312,490.65 and 68,089.10 is: 102,138.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,316.30 : 312,490.65 = 68,089.10 : x
  2. Step 2: Convert to fraction form
    208,316.30/312,490.65 = 68,089.10/x
  3. Step 3: Cross multiply
    208,316.30x = 312,490.65 × 68,089.10
  4. Step 4: Simplify right side
    208,316.30x = 21,277,205,554.46
  5. Step 5: Solve for x
    x = 21,277,205,554.46/208,316.30
  6. Step 6: Final answer
    x = 102,138.94

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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.