Home / 112,972.51-156,064.28-90,281.78

Finding the Fourth Proportional to 112,972.51, 156,064.28 and 90,281.78

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Solution

The fourth proportional to 112,972.51, 156,064.28 and 90,281.78 is: 124,718.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,972.51 : 156,064.28 = 90,281.78 : x
  2. Step 2: Convert to fraction form
    112,972.51/156,064.28 = 90,281.78/x
  3. Step 3: Cross multiply
    112,972.51x = 156,064.28 × 90,281.78
  4. Step 4: Simplify right side
    112,972.51x = 14,089,760,992.82
  5. Step 5: Solve for x
    x = 14,089,760,992.82/112,972.51
  6. Step 6: Final answer
    x = 124,718.49

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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.