Home / 210,536.16-315,810-70,289.76

Finding the Fourth Proportional to 210,536.16, 315,810 and 70,289.76

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Solution

The fourth proportional to 210,536.16, 315,810 and 70,289.76 is: 105,436.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,536.16 : 315,810 = 70,289.76 : x
  2. Step 2: Convert to fraction form
    210,536.16/315,810 = 70,289.76/x
  3. Step 3: Cross multiply
    210,536.16x = 315,810 × 70,289.76
  4. Step 4: Simplify right side
    210,536.16x = 22,198,209,105.60
  5. Step 5: Solve for x
    x = 22,198,209,105.60/210,536.16
  6. Step 6: Final answer
    x = 105,436.56

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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.