Home / 88,009.16-121,459.55-74,321.78

Finding the Fourth Proportional to 88,009.16, 121,459.55 and 74,321.78

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Solution

The fourth proportional to 88,009.16, 121,459.55 and 74,321.78 is: 102,569.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,009.16 : 121,459.55 = 74,321.78 : x
  2. Step 2: Convert to fraction form
    88,009.16/121,459.55 = 74,321.78/x
  3. Step 3: Cross multiply
    88,009.16x = 121,459.55 × 74,321.78
  4. Step 4: Simplify right side
    88,009.16x = 9,027,089,954.00
  5. Step 5: Solve for x
    x = 9,027,089,954.00/88,009.16
  6. Step 6: Final answer
    x = 102,569.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.