Home / 81,931.19-122,926.37-28,631.12

Finding the Fourth Proportional to 81,931.19, 122,926.37 and 28,631.12

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Solution

The fourth proportional to 81,931.19, 122,926.37 and 28,631.12 is: 42,957.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,931.19 : 122,926.37 = 28,631.12 : x
  2. Step 2: Convert to fraction form
    81,931.19/122,926.37 = 28,631.12/x
  3. Step 3: Cross multiply
    81,931.19x = 122,926.37 × 28,631.12
  4. Step 4: Simplify right side
    81,931.19x = 3,519,518,892.85
  5. Step 5: Solve for x
    x = 3,519,518,892.85/81,931.19
  6. Step 6: Final answer
    x = 42,957.01

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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.