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Finding the Fourth Proportional to 103,878.79, 155,695.14 and 47,671.52

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Solution

The fourth proportional to 103,878.79, 155,695.14 and 47,671.52 is: 71,450.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,878.79 : 155,695.14 = 47,671.52 : x
  2. Step 2: Convert to fraction form
    103,878.79/155,695.14 = 47,671.52/x
  3. Step 3: Cross multiply
    103,878.79x = 155,695.14 × 47,671.52
  4. Step 4: Simplify right side
    103,878.79x = 7,422,223,980.41
  5. Step 5: Solve for x
    x = 7,422,223,980.41/103,878.79
  6. Step 6: Final answer
    x = 71,450.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.