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Finding the Fourth Proportional to 98,090.61, 135,405.72 and 66,302.57

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Solution

The fourth proportional to 98,090.61, 135,405.72 and 66,302.57 is: 91,525.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,090.61 : 135,405.72 = 66,302.57 : x
  2. Step 2: Convert to fraction form
    98,090.61/135,405.72 = 66,302.57/x
  3. Step 3: Cross multiply
    98,090.61x = 135,405.72 × 66,302.57
  4. Step 4: Simplify right side
    98,090.61x = 8,977,746,551.67
  5. Step 5: Solve for x
    x = 8,977,746,551.67/98,090.61
  6. Step 6: Final answer
    x = 91,525.04

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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.