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Finding the Fourth Proportional to 51,291.84, 70,801.92 and 39,938.88

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Solution

The fourth proportional to 51,291.84, 70,801.92 and 39,938.88 is: 55,130.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,291.84 : 70,801.92 = 39,938.88 : x
  2. Step 2: Convert to fraction form
    51,291.84/70,801.92 = 39,938.88/x
  3. Step 3: Cross multiply
    51,291.84x = 70,801.92 × 39,938.88
  4. Step 4: Simplify right side
    51,291.84x = 2,827,749,386.65
  5. Step 5: Solve for x
    x = 2,827,749,386.65/51,291.84
  6. Step 6: Final answer
    x = 55,130.59

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1.5x scale

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.