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Finding the Fourth Proportional to 98,299.15, 135,562.81 and 72,868.86

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Solution

The fourth proportional to 98,299.15, 135,562.81 and 72,868.86 is: 100,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,299.15 : 135,562.81 = 72,868.86 : x
  2. Step 2: Convert to fraction form
    98,299.15/135,562.81 = 72,868.86/x
  3. Step 3: Cross multiply
    98,299.15x = 135,562.81 × 72,868.86
  4. Step 4: Simplify right side
    98,299.15x = 9,878,307,423.10
  5. Step 5: Solve for x
    x = 9,878,307,423.10/98,299.15
  6. Step 6: Final answer
    x = 100,492.30

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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.