Home / 99,905.40-137,878.20-57,477.60

Finding the Fourth Proportional to 99,905.40, 137,878.20 and 57,477.60

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Solution

The fourth proportional to 99,905.40, 137,878.20 and 57,477.60 is: 79,324.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,905.40 : 137,878.20 = 57,477.60 : x
  2. Step 2: Convert to fraction form
    99,905.40/137,878.20 = 57,477.60/x
  3. Step 3: Cross multiply
    99,905.40x = 137,878.20 × 57,477.60
  4. Step 4: Simplify right side
    99,905.40x = 7,924,908,028.32
  5. Step 5: Solve for x
    x = 7,924,908,028.32/99,905.40
  6. Step 6: Final answer
    x = 79,324.12

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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.