Home / 78,430.31-117,593.45-28,504.47

Finding the Fourth Proportional to 78,430.31, 117,593.45 and 28,504.47

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Solution

The fourth proportional to 78,430.31, 117,593.45 and 28,504.47 is: 42,737.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,430.31 : 117,593.45 = 28,504.47 : x
  2. Step 2: Convert to fraction form
    78,430.31/117,593.45 = 28,504.47/x
  3. Step 3: Cross multiply
    78,430.31x = 117,593.45 × 28,504.47
  4. Step 4: Simplify right side
    78,430.31x = 3,351,939,533.40
  5. Step 5: Solve for x
    x = 3,351,939,533.40/78,430.31
  6. Step 6: Final answer
    x = 42,737.81

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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.