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Finding the Fourth Proportional to 70,436.96, 105,500.40 and 66,554.96

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Solution

The fourth proportional to 70,436.96, 105,500.40 and 66,554.96 is: 99,685.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,436.96 : 105,500.40 = 66,554.96 : x
  2. Step 2: Convert to fraction form
    70,436.96/105,500.40 = 66,554.96/x
  3. Step 3: Cross multiply
    70,436.96x = 105,500.40 × 66,554.96
  4. Step 4: Simplify right side
    70,436.96x = 7,021,574,901.98
  5. Step 5: Solve for x
    x = 7,021,574,901.98/70,436.96
  6. Step 6: Final answer
    x = 99,685.94

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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.