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Finding the Fourth Proportional to 98,740.80, 148,111.20 and 79,057.80

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Solution

The fourth proportional to 98,740.80, 148,111.20 and 79,057.80 is: 118,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,740.80 : 148,111.20 = 79,057.80 : x
  2. Step 2: Convert to fraction form
    98,740.80/148,111.20 = 79,057.80/x
  3. Step 3: Cross multiply
    98,740.80x = 148,111.20 × 79,057.80
  4. Step 4: Simplify right side
    98,740.80x = 11,709,345,627.36
  5. Step 5: Solve for x
    x = 11,709,345,627.36/98,740.80
  6. Step 6: Final answer
    x = 118,586.70

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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.