Home / 99,740.16-137,648.16-57,315.60

Finding the Fourth Proportional to 99,740.16, 137,648.16 and 57,315.60

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Solution

The fourth proportional to 99,740.16, 137,648.16 and 57,315.60 is: 79,099.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,740.16 : 137,648.16 = 57,315.60 : x
  2. Step 2: Convert to fraction form
    99,740.16/137,648.16 = 57,315.60/x
  3. Step 3: Cross multiply
    99,740.16x = 137,648.16 × 57,315.60
  4. Step 4: Simplify right side
    99,740.16x = 7,889,386,879.30
  5. Step 5: Solve for x
    x = 7,889,386,879.30/99,740.16
  6. Step 6: Final answer
    x = 79,099.40

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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.