Home / 128,853.04-177,816.86-72,265.64

Finding the Fourth Proportional to 128,853.04, 177,816.86 and 72,265.64

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Solution

The fourth proportional to 128,853.04, 177,816.86 and 72,265.64 is: 99,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.04 : 177,816.86 = 72,265.64 : x
  2. Step 2: Convert to fraction form
    128,853.04/177,816.86 = 72,265.64/x
  3. Step 3: Cross multiply
    128,853.04x = 177,816.86 × 72,265.64
  4. Step 4: Simplify right side
    128,853.04x = 12,850,049,190.69
  5. Step 5: Solve for x
    x = 12,850,049,190.69/128,853.04
  6. Step 6: Final answer
    x = 99,726.40

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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.