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Finding the Fourth Proportional to 210,188.40, 315,282.60 and 77,077.68

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Solution

The fourth proportional to 210,188.40, 315,282.60 and 77,077.68 is: 115,616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,188.40 : 315,282.60 = 77,077.68 : x
  2. Step 2: Convert to fraction form
    210,188.40/315,282.60 = 77,077.68/x
  3. Step 3: Cross multiply
    210,188.40x = 315,282.60 × 77,077.68
  4. Step 4: Simplify right side
    210,188.40x = 24,301,251,352.37
  5. Step 5: Solve for x
    x = 24,301,251,352.37/210,188.40
  6. Step 6: Final answer
    x = 115,616.52

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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.