Home / 128,841.94-177,802.09-71,479.46

Finding the Fourth Proportional to 128,841.94, 177,802.09 and 71,479.46

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Solution

The fourth proportional to 128,841.94, 177,802.09 and 71,479.46 is: 98,641.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,841.94 : 177,802.09 = 71,479.46 : x
  2. Step 2: Convert to fraction form
    128,841.94/177,802.09 = 71,479.46/x
  3. Step 3: Cross multiply
    128,841.94x = 177,802.09 × 71,479.46
  4. Step 4: Simplify right side
    128,841.94x = 12,709,197,645.88
  5. Step 5: Solve for x
    x = 12,709,197,645.88/128,841.94
  6. Step 6: Final answer
    x = 98,641.77

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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.