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Finding the Fourth Proportional to 188,586.40, 260,242.50 and 103,702.72

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Solution

The fourth proportional to 188,586.40, 260,242.50 and 103,702.72 is: 143,106.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,586.40 : 260,242.50 = 103,702.72 : x
  2. Step 2: Convert to fraction form
    188,586.40/260,242.50 = 103,702.72/x
  3. Step 3: Cross multiply
    188,586.40x = 260,242.50 × 103,702.72
  4. Step 4: Simplify right side
    188,586.40x = 26,987,855,109.60
  5. Step 5: Solve for x
    x = 26,987,855,109.60/188,586.40
  6. Step 6: Final answer
    x = 143,106.05

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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.