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Finding the Fourth Proportional to 65,688.60, 98,387.10 and 56,940.60

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Solution

The fourth proportional to 65,688.60, 98,387.10 and 56,940.60 is: 85,284.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,688.60 : 98,387.10 = 56,940.60 : x
  2. Step 2: Convert to fraction form
    65,688.60/98,387.10 = 56,940.60/x
  3. Step 3: Cross multiply
    65,688.60x = 98,387.10 × 56,940.60
  4. Step 4: Simplify right side
    65,688.60x = 5,602,220,506.26
  5. Step 5: Solve for x
    x = 5,602,220,506.26/65,688.60
  6. Step 6: Final answer
    x = 85,284.52

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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.