Home / 76,712.40-114,921.18-47,043.72

Finding the Fourth Proportional to 76,712.40, 114,921.18 and 47,043.72

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Solution

The fourth proportional to 76,712.40, 114,921.18 and 47,043.72 is: 70,475.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,712.40 : 114,921.18 = 47,043.72 : x
  2. Step 2: Convert to fraction form
    76,712.40/114,921.18 = 47,043.72/x
  3. Step 3: Cross multiply
    76,712.40x = 114,921.18 × 47,043.72
  4. Step 4: Simplify right side
    76,712.40x = 5,406,319,813.99
  5. Step 5: Solve for x
    x = 5,406,319,813.99/76,712.40
  6. Step 6: Final answer
    x = 70,475.17

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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.