Home / 113,631.48-156,719.43-99,990.07

Finding the Fourth Proportional to 113,631.48, 156,719.43 and 99,990.07

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Solution

The fourth proportional to 113,631.48, 156,719.43 and 99,990.07 is: 137,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,631.48 : 156,719.43 = 99,990.07 : x
  2. Step 2: Convert to fraction form
    113,631.48/156,719.43 = 99,990.07/x
  3. Step 3: Cross multiply
    113,631.48x = 156,719.43 × 99,990.07
  4. Step 4: Simplify right side
    113,631.48x = 15,670,386,384.26
  5. Step 5: Solve for x
    x = 15,670,386,384.26/113,631.48
  6. Step 6: Final answer
    x = 137,905.33

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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.