Home / 98,128-135,431.22-57,828.88

Finding the Fourth Proportional to 98,128, 135,431.22 and 57,828.88

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Solution

The fourth proportional to 98,128, 135,431.22 and 57,828.88 is: 79,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128 : 135,431.22 = 57,828.88 : x
  2. Step 2: Convert to fraction form
    98,128/135,431.22 = 57,828.88/x
  3. Step 3: Cross multiply
    98,128x = 135,431.22 × 57,828.88
  4. Step 4: Simplify right side
    98,128x = 7,831,835,769.63
  5. Step 5: Solve for x
    x = 7,831,835,769.63/98,128
  6. Step 6: Final answer
    x = 79,812.45

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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.