Home / 128,398.03-177,187.71-71,041.53

Finding the Fourth Proportional to 128,398.03, 177,187.71 and 71,041.53

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Solution

The fourth proportional to 128,398.03, 177,187.71 and 71,041.53 is: 98,036.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,398.03 : 177,187.71 = 71,041.53 : x
  2. Step 2: Convert to fraction form
    128,398.03/177,187.71 = 71,041.53/x
  3. Step 3: Cross multiply
    128,398.03x = 177,187.71 × 71,041.53
  4. Step 4: Simplify right side
    128,398.03x = 12,587,686,015.60
  5. Step 5: Solve for x
    x = 12,587,686,015.60/128,398.03
  6. Step 6: Final answer
    x = 98,036.44

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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.