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Finding the Fourth Proportional to 92,980.12, 128,311.80 and 50,538.52

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Solution

The fourth proportional to 92,980.12, 128,311.80 and 50,538.52 is: 69,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,980.12 : 128,311.80 = 50,538.52 : x
  2. Step 2: Convert to fraction form
    92,980.12/128,311.80 = 50,538.52/x
  3. Step 3: Cross multiply
    92,980.12x = 128,311.80 × 50,538.52
  4. Step 4: Simplify right side
    92,980.12x = 6,484,688,470.54
  5. Step 5: Solve for x
    x = 6,484,688,470.54/92,980.12
  6. Step 6: Final answer
    x = 69,742.74

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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.