Home / 97,931.20-146,918.40-31,374.40

Finding the Fourth Proportional to 97,931.20, 146,918.40 and 31,374.40

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Solution

The fourth proportional to 97,931.20, 146,918.40 and 31,374.40 is: 47,068.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,931.20 : 146,918.40 = 31,374.40 : x
  2. Step 2: Convert to fraction form
    97,931.20/146,918.40 = 31,374.40/x
  3. Step 3: Cross multiply
    97,931.20x = 146,918.40 × 31,374.40
  4. Step 4: Simplify right side
    97,931.20x = 4,609,476,648.96
  5. Step 5: Solve for x
    x = 4,609,476,648.96/97,931.20
  6. Step 6: Final answer
    x = 47,068.52

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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.