Home / 142,643.45-196,847.96-78,981.24

Finding the Fourth Proportional to 142,643.45, 196,847.96 and 78,981.24

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Solution

The fourth proportional to 142,643.45, 196,847.96 and 78,981.24 is: 108,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,643.45 : 196,847.96 = 78,981.24 : x
  2. Step 2: Convert to fraction form
    142,643.45/196,847.96 = 78,981.24/x
  3. Step 3: Cross multiply
    142,643.45x = 196,847.96 × 78,981.24
  4. Step 4: Simplify right side
    142,643.45x = 15,547,295,577.36
  5. Step 5: Solve for x
    x = 15,547,295,577.36/142,643.45
  6. Step 6: Final answer
    x = 108,994.11

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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.