Home / 100,111.53-138,188.48-57,686.97

Finding the Fourth Proportional to 100,111.53, 138,188.48 and 57,686.97

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Solution

The fourth proportional to 100,111.53, 138,188.48 and 57,686.97 is: 79,627.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,111.53 : 138,188.48 = 57,686.97 : x
  2. Step 2: Convert to fraction form
    100,111.53/138,188.48 = 57,686.97/x
  3. Step 3: Cross multiply
    100,111.53x = 138,188.48 × 57,686.97
  4. Step 4: Simplify right side
    100,111.53x = 7,971,674,411.67
  5. Step 5: Solve for x
    x = 7,971,674,411.67/100,111.53
  6. Step 6: Final answer
    x = 79,627.94

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1.5x scale

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.