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Finding the Fourth Proportional to 88,693.40, 133,040.10 and 81,435.80

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Solution

The fourth proportional to 88,693.40, 133,040.10 and 81,435.80 is: 122,153.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,693.40 : 133,040.10 = 81,435.80 : x
  2. Step 2: Convert to fraction form
    88,693.40/133,040.10 = 81,435.80/x
  3. Step 3: Cross multiply
    88,693.40x = 133,040.10 × 81,435.80
  4. Step 4: Simplify right side
    88,693.40x = 10,834,226,975.58
  5. Step 5: Solve for x
    x = 10,834,226,975.58/88,693.40
  6. Step 6: Final answer
    x = 122,153.70

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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.