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Finding the Fourth Proportional to 170,643.02, 255,765.18 and 128,387.32

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Solution

The fourth proportional to 170,643.02, 255,765.18 and 128,387.32 is: 192,431.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,643.02 : 255,765.18 = 128,387.32 : x
  2. Step 2: Convert to fraction form
    170,643.02/255,765.18 = 128,387.32/x
  3. Step 3: Cross multiply
    170,643.02x = 255,765.18 × 128,387.32
  4. Step 4: Simplify right side
    170,643.02x = 32,837,005,370.10
  5. Step 5: Solve for x
    x = 32,837,005,370.10/170,643.02
  6. Step 6: Final answer
    x = 192,431.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.