Home / 81,281.94-121,927.66-31,362.30

Finding the Fourth Proportional to 81,281.94, 121,927.66 and 31,362.30

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Solution

The fourth proportional to 81,281.94, 121,927.66 and 31,362.30 is: 47,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.94 : 121,927.66 = 31,362.30 : x
  2. Step 2: Convert to fraction form
    81,281.94/121,927.66 = 31,362.30/x
  3. Step 3: Cross multiply
    81,281.94x = 121,927.66 × 31,362.30
  4. Step 4: Simplify right side
    81,281.94x = 3,823,931,851.22
  5. Step 5: Solve for x
    x = 3,823,931,851.22/81,281.94
  6. Step 6: Final answer
    x = 47,045.28

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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.