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Finding the Fourth Proportional to 188,521, 260,159.52 and 103,638.67

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Solution

The fourth proportional to 188,521, 260,159.52 and 103,638.67 is: 143,021.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,521 : 260,159.52 = 103,638.67 : x
  2. Step 2: Convert to fraction form
    188,521/260,159.52 = 103,638.67/x
  3. Step 3: Cross multiply
    188,521x = 260,159.52 × 103,638.67
  4. Step 4: Simplify right side
    188,521x = 26,962,586,640.64
  5. Step 5: Solve for x
    x = 26,962,586,640.64/188,521
  6. Step 6: Final answer
    x = 143,021.66

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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.