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Finding the Fourth Proportional to 231,477.12, 319,443.84 and 130,875.84

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Solution

The fourth proportional to 231,477.12, 319,443.84 and 130,875.84 is: 180,611.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,477.12 : 319,443.84 = 130,875.84 : x
  2. Step 2: Convert to fraction form
    231,477.12/319,443.84 = 130,875.84/x
  3. Step 3: Cross multiply
    231,477.12x = 319,443.84 × 130,875.84
  4. Step 4: Simplify right side
    231,477.12x = 41,807,480,892.83
  5. Step 5: Solve for x
    x = 41,807,480,892.83/231,477.12
  6. Step 6: Final answer
    x = 180,611.72

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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.