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Finding the Fourth Proportional to 316,386.78, 474,482.37 and 91,763.72

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Solution

The fourth proportional to 316,386.78, 474,482.37 and 91,763.72 is: 137,617.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,386.78 : 474,482.37 = 91,763.72 : x
  2. Step 2: Convert to fraction form
    316,386.78/474,482.37 = 91,763.72/x
  3. Step 3: Cross multiply
    316,386.78x = 474,482.37 × 91,763.72
  4. Step 4: Simplify right side
    316,386.78x = 43,540,267,096.63
  5. Step 5: Solve for x
    x = 43,540,267,096.63/316,386.78
  6. Step 6: Final answer
    x = 137,617.22

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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.