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Finding the Fourth Proportional to 128,393.60, 177,227.70 and 88,240.28

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Solution

The fourth proportional to 128,393.60, 177,227.70 and 88,240.28 is: 121,802.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,393.60 : 177,227.70 = 88,240.28 : x
  2. Step 2: Convert to fraction form
    128,393.60/177,227.70 = 88,240.28/x
  3. Step 3: Cross multiply
    128,393.60x = 177,227.70 × 88,240.28
  4. Step 4: Simplify right side
    128,393.60x = 15,638,621,871.76
  5. Step 5: Solve for x
    x = 15,638,621,871.76/128,393.60
  6. Step 6: Final answer
    x = 121,802.19

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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.