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Finding the Fourth Proportional to 97,015.80, 133,855.50 and 56,739.48

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Solution

The fourth proportional to 97,015.80, 133,855.50 and 56,739.48 is: 78,285.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,015.80 : 133,855.50 = 56,739.48 : x
  2. Step 2: Convert to fraction form
    97,015.80/133,855.50 = 56,739.48/x
  3. Step 3: Cross multiply
    97,015.80x = 133,855.50 × 56,739.48
  4. Step 4: Simplify right side
    97,015.80x = 7,594,891,465.14
  5. Step 5: Solve for x
    x = 7,594,891,465.14/97,015.80
  6. Step 6: Final answer
    x = 78,285.10

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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.