Home / 128,396.13-177,187.26-71,807.50

Finding the Fourth Proportional to 128,396.13, 177,187.26 and 71,807.50

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Solution

The fourth proportional to 128,396.13, 177,187.26 and 71,807.50 is: 99,094.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,396.13 : 177,187.26 = 71,807.50 : x
  2. Step 2: Convert to fraction form
    128,396.13/177,187.26 = 71,807.50/x
  3. Step 3: Cross multiply
    128,396.13x = 177,187.26 × 71,807.50
  4. Step 4: Simplify right side
    128,396.13x = 12,723,374,172.45
  5. Step 5: Solve for x
    x = 12,723,374,172.45/128,396.13
  6. Step 6: Final answer
    x = 99,094.69

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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.