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Finding the Fourth Proportional to 78,587.98, 117,880.83 and 19,423.65

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Solution

The fourth proportional to 78,587.98, 117,880.83 and 19,423.65 is: 29,135.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.98 : 117,880.83 = 19,423.65 : x
  2. Step 2: Convert to fraction form
    78,587.98/117,880.83 = 19,423.65/x
  3. Step 3: Cross multiply
    78,587.98x = 117,880.83 × 19,423.65
  4. Step 4: Simplify right side
    78,587.98x = 2,289,675,983.63
  5. Step 5: Solve for x
    x = 2,289,675,983.63/78,587.98
  6. Step 6: Final answer
    x = 29,135.19

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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.