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Finding the Fourth Proportional to 153,491.40, 211,824.72 and 85,508.46

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Solution

The fourth proportional to 153,491.40, 211,824.72 and 85,508.46 is: 118,005.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,491.40 : 211,824.72 = 85,508.46 : x
  2. Step 2: Convert to fraction form
    153,491.40/211,824.72 = 85,508.46/x
  3. Step 3: Cross multiply
    153,491.40x = 211,824.72 × 85,508.46
  4. Step 4: Simplify right side
    153,491.40x = 18,112,805,597.13
  5. Step 5: Solve for x
    x = 18,112,805,597.13/153,491.40
  6. Step 6: Final answer
    x = 118,005.34

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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.