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Finding the Fourth Proportional to 188,490.40, 260,117.61 and 103,612.93

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Solution

The fourth proportional to 188,490.40, 260,117.61 and 103,612.93 is: 142,986.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,490.40 : 260,117.61 = 103,612.93 : x
  2. Step 2: Convert to fraction form
    188,490.40/260,117.61 = 103,612.93/x
  3. Step 3: Cross multiply
    188,490.40x = 260,117.61 × 103,612.93
  4. Step 4: Simplify right side
    188,490.40x = 26,951,547,716.70
  5. Step 5: Solve for x
    x = 26,951,547,716.70/188,490.40
  6. Step 6: Final answer
    x = 142,986.32

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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.