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Finding the Fourth Proportional to 98,713.20, 148,069.80 and 79,030.20

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Solution

The fourth proportional to 98,713.20, 148,069.80 and 79,030.20 is: 118,545.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,713.20 : 148,069.80 = 79,030.20 : x
  2. Step 2: Convert to fraction form
    98,713.20/148,069.80 = 79,030.20/x
  3. Step 3: Cross multiply
    98,713.20x = 148,069.80 × 79,030.20
  4. Step 4: Simplify right side
    98,713.20x = 11,701,985,907.96
  5. Step 5: Solve for x
    x = 11,701,985,907.96/98,713.20
  6. Step 6: Final answer
    x = 118,545.30

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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.