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Finding the Fourth Proportional to 98,412.30, 135,808.65 and 55,968.30

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Solution

The fourth proportional to 98,412.30, 135,808.65 and 55,968.30 is: 77,236.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,412.30 : 135,808.65 = 55,968.30 : x
  2. Step 2: Convert to fraction form
    98,412.30/135,808.65 = 55,968.30/x
  3. Step 3: Cross multiply
    98,412.30x = 135,808.65 × 55,968.30
  4. Step 4: Simplify right side
    98,412.30x = 7,600,979,265.80
  5. Step 5: Solve for x
    x = 7,600,979,265.80/98,412.30
  6. Step 6: Final answer
    x = 77,236.07

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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.