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Finding the Fourth Proportional to 128,323.32, 177,081.11 and 70,958.92

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Solution

The fourth proportional to 128,323.32, 177,081.11 and 70,958.92 is: 97,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,323.32 : 177,081.11 = 70,958.92 : x
  2. Step 2: Convert to fraction form
    128,323.32/177,081.11 = 70,958.92/x
  3. Step 3: Cross multiply
    128,323.32x = 177,081.11 × 70,958.92
  4. Step 4: Simplify right side
    128,323.32x = 12,565,483,963.21
  5. Step 5: Solve for x
    x = 12,565,483,963.21/128,323.32
  6. Step 6: Final answer
    x = 97,920.50

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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.