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Finding the Fourth Proportional to 210,881.42, 315,924.85 and 104,140.43

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Solution

The fourth proportional to 210,881.42, 315,924.85 and 104,140.43 is: 156,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,881.42 : 315,924.85 = 104,140.43 : x
  2. Step 2: Convert to fraction form
    210,881.42/315,924.85 = 104,140.43/x
  3. Step 3: Cross multiply
    210,881.42x = 315,924.85 × 104,140.43
  4. Step 4: Simplify right side
    210,881.42x = 32,900,549,169.06
  5. Step 5: Solve for x
    x = 32,900,549,169.06/210,881.42
  6. Step 6: Final answer
    x = 156,014.45

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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.