Home / 112,399,318.80-168,556,987.80-78,219,133.20

Finding the Fourth Proportional to 112,399,318.80, 168,556,987.80 and 78,219,133.20

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Solution

The fourth proportional to 112,399,318.80, 168,556,987.80 and 78,219,133.20 is: 117,299,478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,399,318.80 : 168,556,987.80 = 78,219,133.20 : x
  2. Step 2: Convert to fraction form
    112,399,318.80/168,556,987.80 = 78,219,133.20/x
  3. Step 3: Cross multiply
    112,399,318.80x = 168,556,987.80 × 78,219,133.20
  4. Step 4: Simplify right side
    112,399,318.80x = 13,184,381,480,518,976
  5. Step 5: Solve for x
    x = 13,184,381,480,518,976/112,399,318.80
  6. Step 6: Final answer
    x = 117,299,478.51

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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.