Home / 210,221.48-315,379.74-69,985.64

Finding the Fourth Proportional to 210,221.48, 315,379.74 and 69,985.64

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Solution

The fourth proportional to 210,221.48, 315,379.74 and 69,985.64 is: 104,994.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,221.48 : 315,379.74 = 69,985.64 : x
  2. Step 2: Convert to fraction form
    210,221.48/315,379.74 = 69,985.64/x
  3. Step 3: Cross multiply
    210,221.48x = 315,379.74 × 69,985.64
  4. Step 4: Simplify right side
    210,221.48x = 22,072,052,946.93
  5. Step 5: Solve for x
    x = 22,072,052,946.93/210,221.48
  6. Step 6: Final answer
    x = 104,994.28

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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.