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Finding the Fourth Proportional to 98,135.80, 147,030.90 and 80,510.20

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Solution

The fourth proportional to 98,135.80, 147,030.90 and 80,510.20 is: 120,623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,135.80 : 147,030.90 = 80,510.20 : x
  2. Step 2: Convert to fraction form
    98,135.80/147,030.90 = 80,510.20/x
  3. Step 3: Cross multiply
    98,135.80x = 147,030.90 × 80,510.20
  4. Step 4: Simplify right side
    98,135.80x = 11,837,487,165.18
  5. Step 5: Solve for x
    x = 11,837,487,165.18/98,135.80
  6. Step 6: Final answer
    x = 120,623.54

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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.