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Finding the Fourth Proportional to 98,989.20, 148,483.80 and 56,998.80

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Solution

The fourth proportional to 98,989.20, 148,483.80 and 56,998.80 is: 85,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,989.20 : 148,483.80 = 56,998.80 : x
  2. Step 2: Convert to fraction form
    98,989.20/148,483.80 = 56,998.80/x
  3. Step 3: Cross multiply
    98,989.20x = 148,483.80 × 56,998.80
  4. Step 4: Simplify right side
    98,989.20x = 8,463,398,419.44
  5. Step 5: Solve for x
    x = 8,463,398,419.44/98,989.20
  6. Step 6: Final answer
    x = 85,498.20

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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.