Home / 140,316.80-210,329.40-77,039.60

Finding the Fourth Proportional to 140,316.80, 210,329.40 and 77,039.60

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Solution

The fourth proportional to 140,316.80, 210,329.40 and 77,039.60 is: 115,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,316.80 : 210,329.40 = 77,039.60 : x
  2. Step 2: Convert to fraction form
    140,316.80/210,329.40 = 77,039.60/x
  3. Step 3: Cross multiply
    140,316.80x = 210,329.40 × 77,039.60
  4. Step 4: Simplify right side
    140,316.80x = 16,203,692,844.24
  5. Step 5: Solve for x
    x = 16,203,692,844.24/140,316.80
  6. Step 6: Final answer
    x = 115,479.35

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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.