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Finding the Fourth Proportional to 78,304.70, 117,456.03 and 19,140.89

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Solution

The fourth proportional to 78,304.70, 117,456.03 and 19,140.89 is: 28,711.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,304.70 : 117,456.03 = 19,140.89 : x
  2. Step 2: Convert to fraction form
    78,304.70/117,456.03 = 19,140.89/x
  3. Step 3: Cross multiply
    78,304.70x = 117,456.03 × 19,140.89
  4. Step 4: Simplify right side
    78,304.70x = 2,248,212,362.79
  5. Step 5: Solve for x
    x = 2,248,212,362.79/78,304.70
  6. Step 6: Final answer
    x = 28,711.08

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1.5x scale

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.