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Finding the Fourth Proportional to 48,921.40, 73,187.70 and 42,419.80

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Solution

The fourth proportional to 48,921.40, 73,187.70 and 42,419.80 is: 63,461.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,921.40 : 73,187.70 = 42,419.80 : x
  2. Step 2: Convert to fraction form
    48,921.40/73,187.70 = 42,419.80/x
  3. Step 3: Cross multiply
    48,921.40x = 73,187.70 × 42,419.80
  4. Step 4: Simplify right side
    48,921.40x = 3,104,607,596.46
  5. Step 5: Solve for x
    x = 3,104,607,596.46/48,921.40
  6. Step 6: Final answer
    x = 63,461.14

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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.