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Finding the Fourth Proportional to 147,186.80, 220,780.20 and 139,929.20

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Solution

The fourth proportional to 147,186.80, 220,780.20 and 139,929.20 is: 209,893.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,186.80 : 220,780.20 = 139,929.20 : x
  2. Step 2: Convert to fraction form
    147,186.80/220,780.20 = 139,929.20/x
  3. Step 3: Cross multiply
    147,186.80x = 220,780.20 × 139,929.20
  4. Step 4: Simplify right side
    147,186.80x = 30,893,596,761.84
  5. Step 5: Solve for x
    x = 30,893,596,761.84/147,186.80
  6. Step 6: Final answer
    x = 209,893.80

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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.