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Finding the Fourth Proportional to 112,804.29, 155,661.68 and 61,808.93

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Solution

The fourth proportional to 112,804.29, 155,661.68 and 61,808.93 is: 85,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,804.29 : 155,661.68 = 61,808.93 : x
  2. Step 2: Convert to fraction form
    112,804.29/155,661.68 = 61,808.93/x
  3. Step 3: Cross multiply
    112,804.29x = 155,661.68 × 61,808.93
  4. Step 4: Simplify right side
    112,804.29x = 9,621,280,795.45
  5. Step 5: Solve for x
    x = 9,621,280,795.45/112,804.29
  6. Step 6: Final answer
    x = 85,291.80

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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.