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Finding the Fourth Proportional to 153,604.60, 211,948.66 and 85,606.68

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Solution

The fourth proportional to 153,604.60, 211,948.66 and 85,606.68 is: 118,122.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,604.60 : 211,948.66 = 85,606.68 : x
  2. Step 2: Convert to fraction form
    153,604.60/211,948.66 = 85,606.68/x
  3. Step 3: Cross multiply
    153,604.60x = 211,948.66 × 85,606.68
  4. Step 4: Simplify right side
    153,604.60x = 18,144,221,113.05
  5. Step 5: Solve for x
    x = 18,144,221,113.05/153,604.60
  6. Step 6: Final answer
    x = 118,122.90

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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.