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Finding the Fourth Proportional to 51,045.80, 70,442.64 and 28,384.64

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Solution

The fourth proportional to 51,045.80, 70,442.64 and 28,384.64 is: 39,170.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,045.80 : 70,442.64 = 28,384.64 : x
  2. Step 2: Convert to fraction form
    51,045.80/70,442.64 = 28,384.64/x
  3. Step 3: Cross multiply
    51,045.80x = 70,442.64 × 28,384.64
  4. Step 4: Simplify right side
    51,045.80x = 1,999,488,977.05
  5. Step 5: Solve for x
    x = 1,999,488,977.05/51,045.80
  6. Step 6: Final answer
    x = 39,170.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.