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Finding the Fourth Proportional to 172,153.28, 258,130.56 and 66,849.32

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Solution

The fourth proportional to 172,153.28, 258,130.56 and 66,849.32 is: 100,235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,153.28 : 258,130.56 = 66,849.32 : x
  2. Step 2: Convert to fraction form
    172,153.28/258,130.56 = 66,849.32/x
  3. Step 3: Cross multiply
    172,153.28x = 258,130.56 × 66,849.32
  4. Step 4: Simplify right side
    172,153.28x = 17,255,852,407.22
  5. Step 5: Solve for x
    x = 17,255,852,407.22/172,153.28
  6. Step 6: Final answer
    x = 100,235.40

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1.5x scale

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.