Home / 81,005.31-121,534.61-38,329.07

Finding the Fourth Proportional to 81,005.31, 121,534.61 and 38,329.07

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Solution

The fourth proportional to 81,005.31, 121,534.61 and 38,329.07 is: 57,506.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.31 : 121,534.61 = 38,329.07 : x
  2. Step 2: Convert to fraction form
    81,005.31/121,534.61 = 38,329.07/x
  3. Step 3: Cross multiply
    81,005.31x = 121,534.61 × 38,329.07
  4. Step 4: Simplify right side
    81,005.31x = 4,658,307,774.79
  5. Step 5: Solve for x
    x = 4,658,307,774.79/81,005.31
  6. Step 6: Final answer
    x = 57,506.20

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1.5x scale

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.