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Finding the Fourth Proportional to 188,587.36, 260,252.40 and 103,705

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Solution

The fourth proportional to 188,587.36, 260,252.40 and 103,705 is: 143,113.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,587.36 : 260,252.40 = 103,705 : x
  2. Step 2: Convert to fraction form
    188,587.36/260,252.40 = 103,705/x
  3. Step 3: Cross multiply
    188,587.36x = 260,252.40 × 103,705
  4. Step 4: Simplify right side
    188,587.36x = 26,989,475,142
  5. Step 5: Solve for x
    x = 26,989,475,142/188,587.36
  6. Step 6: Final answer
    x = 143,113.91

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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.