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Finding the Fourth Proportional to 100,837.80, 151,256.70 and 67,012.20

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Solution

The fourth proportional to 100,837.80, 151,256.70 and 67,012.20 is: 100,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,837.80 : 151,256.70 = 67,012.20 : x
  2. Step 2: Convert to fraction form
    100,837.80/151,256.70 = 67,012.20/x
  3. Step 3: Cross multiply
    100,837.80x = 151,256.70 × 67,012.20
  4. Step 4: Simplify right side
    100,837.80x = 10,136,044,231.74
  5. Step 5: Solve for x
    x = 10,136,044,231.74/100,837.80
  6. Step 6: Final answer
    x = 100,518.30

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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.