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Finding the Fourth Proportional to 98,340.40, 135,602.40 and 66,454

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Solution

The fourth proportional to 98,340.40, 135,602.40 and 66,454 is: 91,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,340.40 : 135,602.40 = 66,454 : x
  2. Step 2: Convert to fraction form
    98,340.40/135,602.40 = 66,454/x
  3. Step 3: Cross multiply
    98,340.40x = 135,602.40 × 66,454
  4. Step 4: Simplify right side
    98,340.40x = 9,011,321,889.60
  5. Step 5: Solve for x
    x = 9,011,321,889.60/98,340.40
  6. Step 6: Final answer
    x = 91,633.98

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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.