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Finding the Fourth Proportional to 133,090.65, 199,635.98 and 85,851.45

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Solution

The fourth proportional to 133,090.65, 199,635.98 and 85,851.45 is: 128,777.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,090.65 : 199,635.98 = 85,851.45 : x
  2. Step 2: Convert to fraction form
    133,090.65/199,635.98 = 85,851.45/x
  3. Step 3: Cross multiply
    133,090.65x = 199,635.98 × 85,851.45
  4. Step 4: Simplify right side
    133,090.65x = 17,139,037,925.91
  5. Step 5: Solve for x
    x = 17,139,037,925.91/133,090.65
  6. Step 6: Final answer
    x = 128,777.18

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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.