Home / 53,642.54-74,009.57-30,978.53

Finding the Fourth Proportional to 53,642.54, 74,009.57 and 30,978.53

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Solution

The fourth proportional to 53,642.54, 74,009.57 and 30,978.53 is: 42,740.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,642.54 : 74,009.57 = 30,978.53 : x
  2. Step 2: Convert to fraction form
    53,642.54/74,009.57 = 30,978.53/x
  3. Step 3: Cross multiply
    53,642.54x = 74,009.57 × 30,978.53
  4. Step 4: Simplify right side
    53,642.54x = 2,292,707,947.00
  5. Step 5: Solve for x
    x = 2,292,707,947.00/53,642.54
  6. Step 6: Final answer
    x = 42,740.48

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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.