Home / 74,010.78-111,030.75-21,420.72

Finding the Fourth Proportional to 74,010.78, 111,030.75 and 21,420.72

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Solution

The fourth proportional to 74,010.78, 111,030.75 and 21,420.72 is: 32,135.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,010.78 : 111,030.75 = 21,420.72 : x
  2. Step 2: Convert to fraction form
    74,010.78/111,030.75 = 21,420.72/x
  3. Step 3: Cross multiply
    74,010.78x = 111,030.75 × 21,420.72
  4. Step 4: Simplify right side
    74,010.78x = 2,378,358,607.14
  5. Step 5: Solve for x
    x = 2,378,358,607.14/74,010.78
  6. Step 6: Final answer
    x = 32,135.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.