Home / 113,109.12-155,985.60-72,751.68

Finding the Fourth Proportional to 113,109.12, 155,985.60 and 72,751.68

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Solution

The fourth proportional to 113,109.12, 155,985.60 and 72,751.68 is: 100,329.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,109.12 : 155,985.60 = 72,751.68 : x
  2. Step 2: Convert to fraction form
    113,109.12/155,985.60 = 72,751.68/x
  3. Step 3: Cross multiply
    113,109.12x = 155,985.60 × 72,751.68
  4. Step 4: Simplify right side
    113,109.12x = 11,348,214,455.81
  5. Step 5: Solve for x
    x = 11,348,214,455.81/113,109.12
  6. Step 6: Final answer
    x = 100,329.79

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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.