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Finding the Fourth Proportional to 142,207.78, 213,311.67 and 42,365.40

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Solution

The fourth proportional to 142,207.78, 213,311.67 and 42,365.40 is: 63,548.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,207.78 : 213,311.67 = 42,365.40 : x
  2. Step 2: Convert to fraction form
    142,207.78/213,311.67 = 42,365.40/x
  3. Step 3: Cross multiply
    142,207.78x = 213,311.67 × 42,365.40
  4. Step 4: Simplify right side
    142,207.78x = 9,037,033,157.66
  5. Step 5: Solve for x
    x = 9,037,033,157.66/142,207.78
  6. Step 6: Final answer
    x = 63,548.09

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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.