Home / 142,319.54-196,389.15-78,657.32

Finding the Fourth Proportional to 142,319.54, 196,389.15 and 78,657.32

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Solution

The fourth proportional to 142,319.54, 196,389.15 and 78,657.32 is: 108,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,319.54 : 196,389.15 = 78,657.32 : x
  2. Step 2: Convert to fraction form
    142,319.54/196,389.15 = 78,657.32/x
  3. Step 3: Cross multiply
    142,319.54x = 196,389.15 × 78,657.32
  4. Step 4: Simplify right side
    142,319.54x = 15,447,444,216.08
  5. Step 5: Solve for x
    x = 15,447,444,216.08/142,319.54
  6. Step 6: Final answer
    x = 108,540.57

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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.