Home / 112,890.51-155,720.48-74,649.87

Finding the Fourth Proportional to 112,890.51, 155,720.48 and 74,649.87

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Solution

The fourth proportional to 112,890.51, 155,720.48 and 74,649.87 is: 102,971.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,890.51 : 155,720.48 = 74,649.87 : x
  2. Step 2: Convert to fraction form
    112,890.51/155,720.48 = 74,649.87/x
  3. Step 3: Cross multiply
    112,890.51x = 155,720.48 × 74,649.87
  4. Step 4: Simplify right side
    112,890.51x = 11,624,513,215.09
  5. Step 5: Solve for x
    x = 11,624,513,215.09/112,890.51
  6. Step 6: Final answer
    x = 102,971.57

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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.