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Finding the Fourth Proportional to 235,458.81, 353,345.22 and 85,699.08

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Solution

The fourth proportional to 235,458.81, 353,345.22 and 85,699.08 is: 128,605.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,458.81 : 353,345.22 = 85,699.08 : x
  2. Step 2: Convert to fraction form
    235,458.81/353,345.22 = 85,699.08/x
  3. Step 3: Cross multiply
    235,458.81x = 353,345.22 × 85,699.08
  4. Step 4: Simplify right side
    235,458.81x = 30,281,360,276.40
  5. Step 5: Solve for x
    x = 30,281,360,276.40/235,458.81
  6. Step 6: Final answer
    x = 128,605.76

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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.