Home / 103,130.58-142,247.37-87,777.90

Finding the Fourth Proportional to 103,130.58, 142,247.37 and 87,777.90

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Solution

The fourth proportional to 103,130.58, 142,247.37 and 87,777.90 is: 121,071.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,130.58 : 142,247.37 = 87,777.90 : x
  2. Step 2: Convert to fraction form
    103,130.58/142,247.37 = 87,777.90/x
  3. Step 3: Cross multiply
    103,130.58x = 142,247.37 × 87,777.90
  4. Step 4: Simplify right side
    103,130.58x = 12,486,175,419.12
  5. Step 5: Solve for x
    x = 12,486,175,419.12/103,130.58
  6. Step 6: Final answer
    x = 121,071.51

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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.