Home / 128,002.88-176,637.51-71,403.32

Finding the Fourth Proportional to 128,002.88, 176,637.51 and 71,403.32

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Solution

The fourth proportional to 128,002.88, 176,637.51 and 71,403.32 is: 98,532.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.88 : 176,637.51 = 71,403.32 : x
  2. Step 2: Convert to fraction form
    128,002.88/176,637.51 = 71,403.32/x
  3. Step 3: Cross multiply
    128,002.88x = 176,637.51 × 71,403.32
  4. Step 4: Simplify right side
    128,002.88x = 12,612,503,767.35
  5. Step 5: Solve for x
    x = 12,612,503,767.35/128,002.88
  6. Step 6: Final answer
    x = 98,532.97

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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.