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Finding the Fourth Proportional to 67,998.80, 101,803.80 and 61,000.40

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Solution

The fourth proportional to 67,998.80, 101,803.80 and 61,000.40 is: 91,326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,998.80 : 101,803.80 = 61,000.40 : x
  2. Step 2: Convert to fraction form
    67,998.80/101,803.80 = 61,000.40/x
  3. Step 3: Cross multiply
    67,998.80x = 101,803.80 × 61,000.40
  4. Step 4: Simplify right side
    67,998.80x = 6,210,072,521.52
  5. Step 5: Solve for x
    x = 6,210,072,521.52/67,998.80
  6. Step 6: Final answer
    x = 91,326.21

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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.