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Finding the Fourth Proportional to 81,303.69, 121,955.54 and 53,595.21

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Solution

The fourth proportional to 81,303.69, 121,955.54 and 53,595.21 is: 80,392.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.69 : 121,955.54 = 53,595.21 : x
  2. Step 2: Convert to fraction form
    81,303.69/121,955.54 = 53,595.21/x
  3. Step 3: Cross multiply
    81,303.69x = 121,955.54 × 53,595.21
  4. Step 4: Simplify right side
    81,303.69x = 6,536,232,508.99
  5. Step 5: Solve for x
    x = 6,536,232,508.99/81,303.69
  6. Step 6: Final answer
    x = 80,392.82

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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.