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Finding the Fourth Proportional to 91,764.70, 137,428.35 and 91,764.70

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Solution

The fourth proportional to 91,764.70, 137,428.35 and 91,764.70 is: 137,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,764.70 : 137,428.35 = 91,764.70 : x
  2. Step 2: Convert to fraction form
    91,764.70/137,428.35 = 91,764.70/x
  3. Step 3: Cross multiply
    91,764.70x = 137,428.35 × 91,764.70
  4. Step 4: Simplify right side
    91,764.70x = 12,611,071,309.25
  5. Step 5: Solve for x
    x = 12,611,071,309.25/91,764.70
  6. Step 6: Final answer
    x = 137,428.35

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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.