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Finding the Fourth Proportional to 81,303.78, 121,955.68 and 53,595.30

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Solution

The fourth proportional to 81,303.78, 121,955.68 and 53,595.30 is: 80,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.78 : 121,955.68 = 53,595.30 : x
  2. Step 2: Convert to fraction form
    81,303.78/121,955.68 = 53,595.30/x
  3. Step 3: Cross multiply
    81,303.78x = 121,955.68 × 53,595.30
  4. Step 4: Simplify right side
    81,303.78x = 6,536,251,479.16
  5. Step 5: Solve for x
    x = 6,536,251,479.16/81,303.78
  6. Step 6: Final answer
    x = 80,392.96

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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.