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Finding the Fourth Proportional to 210,243.98, 315,407.51 and 77,125.38

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Solution

The fourth proportional to 210,243.98, 315,407.51 and 77,125.38 is: 115,703.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,243.98 : 315,407.51 = 77,125.38 : x
  2. Step 2: Convert to fraction form
    210,243.98/315,407.51 = 77,125.38/x
  3. Step 3: Cross multiply
    210,243.98x = 315,407.51 × 77,125.38
  4. Step 4: Simplify right side
    210,243.98x = 24,325,923,677.98
  5. Step 5: Solve for x
    x = 24,325,923,677.98/210,243.98
  6. Step 6: Final answer
    x = 115,703.31

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1.5x scale

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.