Home / 210,118.46-315,031.88-76,980.38

Finding the Fourth Proportional to 210,118.46, 315,031.88 and 76,980.38

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Solution

The fourth proportional to 210,118.46, 315,031.88 and 76,980.38 is: 115,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,118.46 : 315,031.88 = 76,980.38 : x
  2. Step 2: Convert to fraction form
    210,118.46/315,031.88 = 76,980.38/x
  3. Step 3: Cross multiply
    210,118.46x = 315,031.88 × 76,980.38
  4. Step 4: Simplify right side
    210,118.46x = 24,251,272,451.81
  5. Step 5: Solve for x
    x = 24,251,272,451.81/210,118.46
  6. Step 6: Final answer
    x = 115,417.15

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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.