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Finding the Fourth Proportional to 68,435.40, 102,653.10 and 63,186.60

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Solution

The fourth proportional to 68,435.40, 102,653.10 and 63,186.60 is: 94,779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,435.40 : 102,653.10 = 63,186.60 : x
  2. Step 2: Convert to fraction form
    68,435.40/102,653.10 = 63,186.60/x
  3. Step 3: Cross multiply
    68,435.40x = 102,653.10 × 63,186.60
  4. Step 4: Simplify right side
    68,435.40x = 6,486,300,368.46
  5. Step 5: Solve for x
    x = 6,486,300,368.46/68,435.40
  6. Step 6: Final answer
    x = 94,779.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.