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Finding the Fourth Proportional to 98,111.70, 135,394.41 and 55,670.12

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Solution

The fourth proportional to 98,111.70, 135,394.41 and 55,670.12 is: 76,824.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,111.70 : 135,394.41 = 55,670.12 : x
  2. Step 2: Convert to fraction form
    98,111.70/135,394.41 = 55,670.12/x
  3. Step 3: Cross multiply
    98,111.70x = 135,394.41 × 55,670.12
  4. Step 4: Simplify right side
    98,111.70x = 7,537,423,052.03
  5. Step 5: Solve for x
    x = 7,537,423,052.03/98,111.70
  6. Step 6: Final answer
    x = 76,824.92

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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.