Home / 210,415.40-315,435.18-77,264.72

Finding the Fourth Proportional to 210,415.40, 315,435.18 and 77,264.72

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Solution

The fourth proportional to 210,415.40, 315,435.18 and 77,264.72 is: 115,828.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,415.40 : 315,435.18 = 77,264.72 : x
  2. Step 2: Convert to fraction form
    210,415.40/315,435.18 = 77,264.72/x
  3. Step 3: Cross multiply
    210,415.40x = 315,435.18 × 77,264.72
  4. Step 4: Simplify right side
    210,415.40x = 24,372,010,860.85
  5. Step 5: Solve for x
    x = 24,372,010,860.85/210,415.40
  6. Step 6: Final answer
    x = 115,828.08

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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.