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Finding the Fourth Proportional to 112,775.70, 155,628.74 and 61,788.02

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Solution

The fourth proportional to 112,775.70, 155,628.74 and 61,788.02 is: 85,266.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,775.70 : 155,628.74 = 61,788.02 : x
  2. Step 2: Convert to fraction form
    112,775.70/155,628.74 = 61,788.02/x
  3. Step 3: Cross multiply
    112,775.70x = 155,628.74 × 61,788.02
  4. Step 4: Simplify right side
    112,775.70x = 9,615,991,699.69
  5. Step 5: Solve for x
    x = 9,615,991,699.69/112,775.70
  6. Step 6: Final answer
    x = 85,266.52

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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.