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Finding the Fourth Proportional to 72,916.68, 100,611.54 and 42,700.44

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Solution

The fourth proportional to 72,916.68, 100,611.54 and 42,700.44 is: 58,918.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,916.68 : 100,611.54 = 42,700.44 : x
  2. Step 2: Convert to fraction form
    72,916.68/100,611.54 = 42,700.44/x
  3. Step 3: Cross multiply
    72,916.68x = 100,611.54 × 42,700.44
  4. Step 4: Simplify right side
    72,916.68x = 4,296,157,027.08
  5. Step 5: Solve for x
    x = 4,296,157,027.08/72,916.68
  6. Step 6: Final answer
    x = 58,918.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.