Home / 81,430.32-121,965.02-62,571.54

Finding the Fourth Proportional to 81,430.32, 121,965.02 and 62,571.54

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Solution

The fourth proportional to 81,430.32, 121,965.02 and 62,571.54 is: 93,718.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.32 : 121,965.02 = 62,571.54 : x
  2. Step 2: Convert to fraction form
    81,430.32/121,965.02 = 62,571.54/x
  3. Step 3: Cross multiply
    81,430.32x = 121,965.02 × 62,571.54
  4. Step 4: Simplify right side
    81,430.32x = 7,631,539,127.53
  5. Step 5: Solve for x
    x = 7,631,539,127.53/81,430.32
  6. Step 6: Final answer
    x = 93,718.64

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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.