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Finding the Fourth Proportional to 112,860.41, 155,749.11 and 61,878.02

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Solution

The fourth proportional to 112,860.41, 155,749.11 and 61,878.02 is: 85,392.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,860.41 : 155,749.11 = 61,878.02 : x
  2. Step 2: Convert to fraction form
    112,860.41/155,749.11 = 61,878.02/x
  3. Step 3: Cross multiply
    112,860.41x = 155,749.11 × 61,878.02
  4. Step 4: Simplify right side
    112,860.41x = 9,637,446,543.56
  5. Step 5: Solve for x
    x = 9,637,446,543.56/112,860.41
  6. Step 6: Final answer
    x = 85,392.62

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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.