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Finding the Fourth Proportional to 70,003.40, 105,005.10 and 67,087.40

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Solution

The fourth proportional to 70,003.40, 105,005.10 and 67,087.40 is: 100,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,003.40 : 105,005.10 = 67,087.40 : x
  2. Step 2: Convert to fraction form
    70,003.40/105,005.10 = 67,087.40/x
  3. Step 3: Cross multiply
    70,003.40x = 105,005.10 × 67,087.40
  4. Step 4: Simplify right side
    70,003.40x = 7,044,519,145.74
  5. Step 5: Solve for x
    x = 7,044,519,145.74/70,003.40
  6. Step 6: Final answer
    x = 100,631.10

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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.