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Finding the Fourth Proportional to 188,889.12, 260,661.60 and 103,994.40

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Solution

The fourth proportional to 188,889.12, 260,661.60 and 103,994.40 is: 143,509.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,889.12 : 260,661.60 = 103,994.40 : x
  2. Step 2: Convert to fraction form
    188,889.12/260,661.60 = 103,994.40/x
  3. Step 3: Cross multiply
    188,889.12x = 260,661.60 × 103,994.40
  4. Step 4: Simplify right side
    188,889.12x = 27,107,346,695.04
  5. Step 5: Solve for x
    x = 27,107,346,695.04/188,889.12
  6. Step 6: Final answer
    x = 143,509.31

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1.5x scale

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.