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Finding the Fourth Proportional to 316,981.08, 475,361.64 and 127,385.28

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Solution

The fourth proportional to 316,981.08, 475,361.64 and 127,385.28 is: 191,033.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,981.08 : 475,361.64 = 127,385.28 : x
  2. Step 2: Convert to fraction form
    316,981.08/475,361.64 = 127,385.28/x
  3. Step 3: Cross multiply
    316,981.08x = 475,361.64 × 127,385.28
  4. Step 4: Simplify right side
    316,981.08x = 60,554,075,612.66
  5. Step 5: Solve for x
    x = 60,554,075,612.66/316,981.08
  6. Step 6: Final answer
    x = 191,033.72

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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.