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Finding the Fourth Proportional to 210,256.68, 315,483.42 and 91,912.68

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Solution

The fourth proportional to 210,256.68, 315,483.42 and 91,912.68 is: 137,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,256.68 : 315,483.42 = 91,912.68 : x
  2. Step 2: Convert to fraction form
    210,256.68/315,483.42 = 91,912.68/x
  3. Step 3: Cross multiply
    210,256.68x = 315,483.42 × 91,912.68
  4. Step 4: Simplify right side
    210,256.68x = 28,996,926,627.77
  5. Step 5: Solve for x
    x = 28,996,926,627.77/210,256.68
  6. Step 6: Final answer
    x = 137,912.04

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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.