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Finding the Fourth Proportional to 210,020.70, 314,949.15 and 91,611.30

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Solution

The fourth proportional to 210,020.70, 314,949.15 and 91,611.30 is: 137,381.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,020.70 : 314,949.15 = 91,611.30 : x
  2. Step 2: Convert to fraction form
    210,020.70/314,949.15 = 91,611.30/x
  3. Step 3: Cross multiply
    210,020.70x = 314,949.15 × 91,611.30
  4. Step 4: Simplify right side
    210,020.70x = 28,852,901,065.40
  5. Step 5: Solve for x
    x = 28,852,901,065.40/210,020.70
  6. Step 6: Final answer
    x = 137,381.23

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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.