Home / 120,931.84-166,931.22-90,804.20

Finding the Fourth Proportional to 120,931.84, 166,931.22 and 90,804.20

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Solution

The fourth proportional to 120,931.84, 166,931.22 and 90,804.20 is: 125,343.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,931.84 : 166,931.22 = 90,804.20 : x
  2. Step 2: Convert to fraction form
    120,931.84/166,931.22 = 90,804.20/x
  3. Step 3: Cross multiply
    120,931.84x = 166,931.22 × 90,804.20
  4. Step 4: Simplify right side
    120,931.84x = 15,158,055,433.10
  5. Step 5: Solve for x
    x = 15,158,055,433.10/120,931.84
  6. Step 6: Final answer
    x = 125,343.80

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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.