Home / 128,448.04-177,261.78-71,858.92

Finding the Fourth Proportional to 128,448.04, 177,261.78 and 71,858.92

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Solution

The fourth proportional to 128,448.04, 177,261.78 and 71,858.92 is: 99,167.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,448.04 : 177,261.78 = 71,858.92 : x
  2. Step 2: Convert to fraction form
    128,448.04/177,261.78 = 71,858.92/x
  3. Step 3: Cross multiply
    128,448.04x = 177,261.78 × 71,858.92
  4. Step 4: Simplify right side
    128,448.04x = 12,737,840,068.08
  5. Step 5: Solve for x
    x = 12,737,840,068.08/128,448.04
  6. Step 6: Final answer
    x = 99,167.26

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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.