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Finding the Fourth Proportional to 67,312.40, 100,973.40 and 20,565.20

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Solution

The fourth proportional to 67,312.40, 100,973.40 and 20,565.20 is: 30,849.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,312.40 : 100,973.40 = 20,565.20 : x
  2. Step 2: Convert to fraction form
    67,312.40/100,973.40 = 20,565.20/x
  3. Step 3: Cross multiply
    67,312.40x = 100,973.40 × 20,565.20
  4. Step 4: Simplify right side
    67,312.40x = 2,076,538,165.68
  5. Step 5: Solve for x
    x = 2,076,538,165.68/67,312.40
  6. Step 6: Final answer
    x = 30,849.27

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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.