Home / 138,913.32-208,399.18-45,411.72

Finding the Fourth Proportional to 138,913.32, 208,399.18 and 45,411.72

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Solution

The fourth proportional to 138,913.32, 208,399.18 and 45,411.72 is: 68,127.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,913.32 : 208,399.18 = 45,411.72 : x
  2. Step 2: Convert to fraction form
    138,913.32/208,399.18 = 45,411.72/x
  3. Step 3: Cross multiply
    138,913.32x = 208,399.18 × 45,411.72
  4. Step 4: Simplify right side
    138,913.32x = 9,463,765,210.39
  5. Step 5: Solve for x
    x = 9,463,765,210.39/138,913.32
  6. Step 6: Final answer
    x = 68,127.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.