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Finding the Fourth Proportional to 73,155.76, 100,955.40 and 39,621.76

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Solution

The fourth proportional to 73,155.76, 100,955.40 and 39,621.76 is: 54,678.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,155.76 : 100,955.40 = 39,621.76 : x
  2. Step 2: Convert to fraction form
    73,155.76/100,955.40 = 39,621.76/x
  3. Step 3: Cross multiply
    73,155.76x = 100,955.40 × 39,621.76
  4. Step 4: Simplify right side
    73,155.76x = 4,000,030,629.50
  5. Step 5: Solve for x
    x = 4,000,030,629.50/73,155.76
  6. Step 6: Final answer
    x = 54,678.27

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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.