Home / 78,304.57-117,455.83-19,140.76

Finding the Fourth Proportional to 78,304.57, 117,455.83 and 19,140.76

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Solution

The fourth proportional to 78,304.57, 117,455.83 and 19,140.76 is: 28,710.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,304.57 : 117,455.83 = 19,140.76 : x
  2. Step 2: Convert to fraction form
    78,304.57/117,455.83 = 19,140.76/x
  3. Step 3: Cross multiply
    78,304.57x = 117,455.83 × 19,140.76
  4. Step 4: Simplify right side
    78,304.57x = 2,248,193,852.63
  5. Step 5: Solve for x
    x = 2,248,193,852.63/78,304.57
  6. Step 6: Final answer
    x = 28,710.89

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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.