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Finding the Fourth Proportional to 112,804.80, 155,718.66 and 76,019.10

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Solution

The fourth proportional to 112,804.80, 155,718.66 and 76,019.10 is: 104,938.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,804.80 : 155,718.66 = 76,019.10 : x
  2. Step 2: Convert to fraction form
    112,804.80/155,718.66 = 76,019.10/x
  3. Step 3: Cross multiply
    112,804.80x = 155,718.66 × 76,019.10
  4. Step 4: Simplify right side
    112,804.80x = 11,837,592,386.41
  5. Step 5: Solve for x
    x = 11,837,592,386.41/112,804.80
  6. Step 6: Final answer
    x = 104,938.73

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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.