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Finding the Fourth Proportional to 235,111.60, 352,699.80 and 85,315.60

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Solution

The fourth proportional to 235,111.60, 352,699.80 and 85,315.60 is: 127,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,111.60 : 352,699.80 = 85,315.60 : x
  2. Step 2: Convert to fraction form
    235,111.60/352,699.80 = 85,315.60/x
  3. Step 3: Cross multiply
    235,111.60x = 352,699.80 × 85,315.60
  4. Step 4: Simplify right side
    235,111.60x = 30,090,795,056.88
  5. Step 5: Solve for x
    x = 30,090,795,056.88/235,111.60
  6. Step 6: Final answer
    x = 127,985.16

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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.