Home / 113,428.13-156,530.81-63,139.01

Finding the Fourth Proportional to 113,428.13, 156,530.81 and 63,139.01

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Solution

The fourth proportional to 113,428.13, 156,530.81 and 63,139.01 is: 87,131.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,428.13 : 156,530.81 = 63,139.01 : x
  2. Step 2: Convert to fraction form
    113,428.13/156,530.81 = 63,139.01/x
  3. Step 3: Cross multiply
    113,428.13x = 156,530.81 × 63,139.01
  4. Step 4: Simplify right side
    113,428.13x = 9,883,199,753.09
  5. Step 5: Solve for x
    x = 9,883,199,753.09/113,428.13
  6. Step 6: Final answer
    x = 87,131.83

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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.