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Finding the Fourth Proportional to 67,661.80, 93,390.18 and 40,820.20

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Solution

The fourth proportional to 67,661.80, 93,390.18 and 40,820.20 is: 56,342.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,661.80 : 93,390.18 = 40,820.20 : x
  2. Step 2: Convert to fraction form
    67,661.80/93,390.18 = 40,820.20/x
  3. Step 3: Cross multiply
    67,661.80x = 93,390.18 × 40,820.20
  4. Step 4: Simplify right side
    67,661.80x = 3,812,205,825.64
  5. Step 5: Solve for x
    x = 3,812,205,825.64/67,661.80
  6. Step 6: Final answer
    x = 56,342.07

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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.