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Finding the Fourth Proportional to 153,215.40, 211,262.90 and 107,878.88

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Solution

The fourth proportional to 153,215.40, 211,262.90 and 107,878.88 is: 148,750.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,215.40 : 211,262.90 = 107,878.88 : x
  2. Step 2: Convert to fraction form
    153,215.40/211,262.90 = 107,878.88/x
  3. Step 3: Cross multiply
    153,215.40x = 211,262.90 × 107,878.88
  4. Step 4: Simplify right side
    153,215.40x = 22,790,805,037.55
  5. Step 5: Solve for x
    x = 22,790,805,037.55/153,215.40
  6. Step 6: Final answer
    x = 148,750.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.