Home / 99,772.05-137,649.36-76,808.89

Finding the Fourth Proportional to 99,772.05, 137,649.36 and 76,808.89

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Solution

The fourth proportional to 99,772.05, 137,649.36 and 76,808.89 is: 105,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,772.05 : 137,649.36 = 76,808.89 : x
  2. Step 2: Convert to fraction form
    99,772.05/137,649.36 = 76,808.89/x
  3. Step 3: Cross multiply
    99,772.05x = 137,649.36 × 76,808.89
  4. Step 4: Simplify right side
    99,772.05x = 10,572,694,166.77
  5. Step 5: Solve for x
    x = 10,572,694,166.77/99,772.05
  6. Step 6: Final answer
    x = 105,968.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.