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Finding the Fourth Proportional to 45,078.66, 67,590.99 and 21,392.10

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Solution

The fourth proportional to 45,078.66, 67,590.99 and 21,392.10 is: 32,075.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,078.66 : 67,590.99 = 21,392.10 : x
  2. Step 2: Convert to fraction form
    45,078.66/67,590.99 = 21,392.10/x
  3. Step 3: Cross multiply
    45,078.66x = 67,590.99 × 21,392.10
  4. Step 4: Simplify right side
    45,078.66x = 1,445,913,217.18
  5. Step 5: Solve for x
    x = 1,445,913,217.18/45,078.66
  6. Step 6: Final answer
    x = 32,075.34

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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.