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Finding the Fourth Proportional to 210,839.60, 316,302.60 and 70,698.80

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Solution

The fourth proportional to 210,839.60, 316,302.60 and 70,698.80 is: 106,062.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,839.60 : 316,302.60 = 70,698.80 : x
  2. Step 2: Convert to fraction form
    210,839.60/316,302.60 = 70,698.80/x
  3. Step 3: Cross multiply
    210,839.60x = 316,302.60 × 70,698.80
  4. Step 4: Simplify right side
    210,839.60x = 22,362,214,256.88
  5. Step 5: Solve for x
    x = 22,362,214,256.88/210,839.60
  6. Step 6: Final answer
    x = 106,062.69

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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.