Home / 78,346.35-117,566.21-28,430.34

Finding the Fourth Proportional to 78,346.35, 117,566.21 and 28,430.34

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Solution

The fourth proportional to 78,346.35, 117,566.21 and 28,430.34 is: 42,662.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.35 : 117,566.21 = 28,430.34 : x
  2. Step 2: Convert to fraction form
    78,346.35/117,566.21 = 28,430.34/x
  3. Step 3: Cross multiply
    78,346.35x = 117,566.21 × 28,430.34
  4. Step 4: Simplify right side
    78,346.35x = 3,342,446,806.06
  5. Step 5: Solve for x
    x = 3,342,446,806.06/78,346.35
  6. Step 6: Final answer
    x = 42,662.45

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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.