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Finding the Fourth Proportional to 51,139.60, 70,573.44 and 28,783.60

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Solution

The fourth proportional to 51,139.60, 70,573.44 and 28,783.60 is: 39,721.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,139.60 : 70,573.44 = 28,783.60 : x
  2. Step 2: Convert to fraction form
    51,139.60/70,573.44 = 28,783.60/x
  3. Step 3: Cross multiply
    51,139.60x = 70,573.44 × 28,783.60
  4. Step 4: Simplify right side
    51,139.60x = 2,031,357,667.58
  5. Step 5: Solve for x
    x = 2,031,357,667.58/51,139.60
  6. Step 6: Final answer
    x = 39,721.81

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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.