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Finding the Fourth Proportional to 111,402, 153,734.76 and 61,099.92

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Solution

The fourth proportional to 111,402, 153,734.76 and 61,099.92 is: 84,317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,402 : 153,734.76 = 61,099.92 : x
  2. Step 2: Convert to fraction form
    111,402/153,734.76 = 61,099.92/x
  3. Step 3: Cross multiply
    111,402x = 153,734.76 × 61,099.92
  4. Step 4: Simplify right side
    111,402x = 9,393,181,537.22
  5. Step 5: Solve for x
    x = 9,393,181,537.22/111,402
  6. Step 6: Final answer
    x = 84,317.89

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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.