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Finding the Fourth Proportional to 98,742.30, 148,113.45 and 79,059.30

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Solution

The fourth proportional to 98,742.30, 148,113.45 and 79,059.30 is: 118,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,742.30 : 148,113.45 = 79,059.30 : x
  2. Step 2: Convert to fraction form
    98,742.30/148,113.45 = 79,059.30/x
  3. Step 3: Cross multiply
    98,742.30x = 148,113.45 × 79,059.30
  4. Step 4: Simplify right side
    98,742.30x = 11,709,745,677.59
  5. Step 5: Solve for x
    x = 11,709,745,677.59/98,742.30
  6. Step 6: Final answer
    x = 118,588.95

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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.