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Finding the Fourth Proportional to 110,885.78, 153,090.19 and 72,160.50

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Solution

The fourth proportional to 110,885.78, 153,090.19 and 72,160.50 is: 99,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,885.78 : 153,090.19 = 72,160.50 : x
  2. Step 2: Convert to fraction form
    110,885.78/153,090.19 = 72,160.50/x
  3. Step 3: Cross multiply
    110,885.78x = 153,090.19 × 72,160.50
  4. Step 4: Simplify right side
    110,885.78x = 11,047,065,319.78
  5. Step 5: Solve for x
    x = 11,047,065,319.78/110,885.78
  6. Step 6: Final answer
    x = 99,625.62

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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.