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Finding the Fourth Proportional to 153,595.60, 211,955.12 and 85,620

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Solution

The fourth proportional to 153,595.60, 211,955.12 and 85,620 is: 118,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,595.60 : 211,955.12 = 85,620 : x
  2. Step 2: Convert to fraction form
    153,595.60/211,955.12 = 85,620/x
  3. Step 3: Cross multiply
    153,595.60x = 211,955.12 × 85,620
  4. Step 4: Simplify right side
    153,595.60x = 18,147,597,374.40
  5. Step 5: Solve for x
    x = 18,147,597,374.40/153,595.60
  6. Step 6: Final answer
    x = 118,151.80

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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.