Home / 128,570.81-177,421.77-71,206.25

Finding the Fourth Proportional to 128,570.81, 177,421.77 and 71,206.25

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Solution

The fourth proportional to 128,570.81, 177,421.77 and 71,206.25 is: 98,261.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.81 : 177,421.77 = 71,206.25 : x
  2. Step 2: Convert to fraction form
    128,570.81/177,421.77 = 71,206.25/x
  3. Step 3: Cross multiply
    128,570.81x = 177,421.77 × 71,206.25
  4. Step 4: Simplify right side
    128,570.81x = 12,633,539,353.62
  5. Step 5: Solve for x
    x = 12,633,539,353.62/128,570.81
  6. Step 6: Final answer
    x = 98,261.33

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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.