Home / 128,643.24-177,523.32-71,280.12

Finding the Fourth Proportional to 128,643.24, 177,523.32 and 71,280.12

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Solution

The fourth proportional to 128,643.24, 177,523.32 and 71,280.12 is: 98,364.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,643.24 : 177,523.32 = 71,280.12 : x
  2. Step 2: Convert to fraction form
    128,643.24/177,523.32 = 71,280.12/x
  3. Step 3: Cross multiply
    128,643.24x = 177,523.32 × 71,280.12
  4. Step 4: Simplify right side
    128,643.24x = 12,653,883,552.40
  5. Step 5: Solve for x
    x = 12,653,883,552.40/128,643.24
  6. Step 6: Final answer
    x = 98,364.15

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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.