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Finding the Fourth Proportional to 111,587.52, 153,990.08 and 66,875.52

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Solution

The fourth proportional to 111,587.52, 153,990.08 and 66,875.52 is: 92,287.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,587.52 : 153,990.08 = 66,875.52 : x
  2. Step 2: Convert to fraction form
    111,587.52/153,990.08 = 66,875.52/x
  3. Step 3: Cross multiply
    111,587.52x = 153,990.08 × 66,875.52
  4. Step 4: Simplify right side
    111,587.52x = 10,298,166,674.84
  5. Step 5: Solve for x
    x = 10,298,166,674.84/111,587.52
  6. Step 6: Final answer
    x = 92,287.80

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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.