Home / 189,401.16-261,137.28-121,306.32

Finding the Fourth Proportional to 189,401.16, 261,137.28 and 121,306.32

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Solution

The fourth proportional to 189,401.16, 261,137.28 and 121,306.32 is: 167,251.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,401.16 : 261,137.28 = 121,306.32 : x
  2. Step 2: Convert to fraction form
    189,401.16/261,137.28 = 121,306.32/x
  3. Step 3: Cross multiply
    189,401.16x = 261,137.28 × 121,306.32
  4. Step 4: Simplify right side
    189,401.16x = 31,677,602,451.61
  5. Step 5: Solve for x
    x = 31,677,602,451.61/189,401.16
  6. Step 6: Final answer
    x = 167,251.36

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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.