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Finding the Fourth Proportional to 131,506.68, 197,309.68 and 78,952.80

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Solution

The fourth proportional to 131,506.68, 197,309.68 and 78,952.80 is: 118,459.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,506.68 : 197,309.68 = 78,952.80 : x
  2. Step 2: Convert to fraction form
    131,506.68/197,309.68 = 78,952.80/x
  3. Step 3: Cross multiply
    131,506.68x = 197,309.68 × 78,952.80
  4. Step 4: Simplify right side
    131,506.68x = 15,578,151,703.10
  5. Step 5: Solve for x
    x = 15,578,151,703.10/131,506.68
  6. Step 6: Final answer
    x = 118,459.01

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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.