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Finding the Fourth Proportional to 113,409.99, 156,495.60 and 65,666.55

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Solution

The fourth proportional to 113,409.99, 156,495.60 and 65,666.55 is: 90,613.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,409.99 : 156,495.60 = 65,666.55 : x
  2. Step 2: Convert to fraction form
    113,409.99/156,495.60 = 65,666.55/x
  3. Step 3: Cross multiply
    113,409.99x = 156,495.60 × 65,666.55
  4. Step 4: Simplify right side
    113,409.99x = 10,276,526,142.18
  5. Step 5: Solve for x
    x = 10,276,526,142.18/113,409.99
  6. Step 6: Final answer
    x = 90,613.94

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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.