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Finding the Fourth Proportional to 188,505.10, 260,130.43 and 103,621.55

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Solution

The fourth proportional to 188,505.10, 260,130.43 and 103,621.55 is: 142,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,505.10 : 260,130.43 = 103,621.55 : x
  2. Step 2: Convert to fraction form
    188,505.10/260,130.43 = 103,621.55/x
  3. Step 3: Cross multiply
    188,505.10x = 260,130.43 × 103,621.55
  4. Step 4: Simplify right side
    188,505.10x = 26,955,118,358.77
  5. Step 5: Solve for x
    x = 26,955,118,358.77/188,505.10
  6. Step 6: Final answer
    x = 142,994.11

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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.