Home / 128,040.16-176,677.86-71,440.60

Finding the Fourth Proportional to 128,040.16, 176,677.86 and 71,440.60

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Solution

The fourth proportional to 128,040.16, 176,677.86 and 71,440.60 is: 98,578.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040.16 : 176,677.86 = 71,440.60 : x
  2. Step 2: Convert to fraction form
    128,040.16/176,677.86 = 71,440.60/x
  3. Step 3: Cross multiply
    128,040.16x = 176,677.86 × 71,440.60
  4. Step 4: Simplify right side
    128,040.16x = 12,621,972,325.12
  5. Step 5: Solve for x
    x = 12,621,972,325.12/128,040.16
  6. Step 6: Final answer
    x = 98,578.23

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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.