Home / 81,155.63-121,695.12-47,431.31

Finding the Fourth Proportional to 81,155.63, 121,695.12 and 47,431.31

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Solution

The fourth proportional to 81,155.63, 121,695.12 and 47,431.31 is: 71,124.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,155.63 : 121,695.12 = 47,431.31 : x
  2. Step 2: Convert to fraction form
    81,155.63/121,695.12 = 47,431.31/x
  3. Step 3: Cross multiply
    81,155.63x = 121,695.12 × 47,431.31
  4. Step 4: Simplify right side
    81,155.63x = 5,772,159,266.45
  5. Step 5: Solve for x
    x = 5,772,159,266.45/81,155.63
  6. Step 6: Final answer
    x = 71,124.57

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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.