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Finding the Fourth Proportional to 210,192.64, 315,219.84 and 69,913.60

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Solution

The fourth proportional to 210,192.64, 315,219.84 and 69,913.60 is: 104,847.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,192.64 : 315,219.84 = 69,913.60 : x
  2. Step 2: Convert to fraction form
    210,192.64/315,219.84 = 69,913.60/x
  3. Step 3: Cross multiply
    210,192.64x = 315,219.84 × 69,913.60
  4. Step 4: Simplify right side
    210,192.64x = 22,038,153,805.82
  5. Step 5: Solve for x
    x = 22,038,153,805.82/210,192.64
  6. Step 6: Final answer
    x = 104,847.41

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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.