Home / 138,985.74-208,767.54-112,361.88

Finding the Fourth Proportional to 138,985.74, 208,767.54 and 112,361.88

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Solution

The fourth proportional to 138,985.74, 208,767.54 and 112,361.88 is: 168,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,985.74 : 208,767.54 = 112,361.88 : x
  2. Step 2: Convert to fraction form
    138,985.74/208,767.54 = 112,361.88/x
  3. Step 3: Cross multiply
    138,985.74x = 208,767.54 × 112,361.88
  4. Step 4: Simplify right side
    138,985.74x = 23,457,513,277.38
  5. Step 5: Solve for x
    x = 23,457,513,277.38/138,985.74
  6. Step 6: Final answer
    x = 168,776.40

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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.