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Finding the Fourth Proportional to 51,400.60, 70,928.88 and 31,254.72

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Solution

The fourth proportional to 51,400.60, 70,928.88 and 31,254.72 is: 43,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,400.60 : 70,928.88 = 31,254.72 : x
  2. Step 2: Convert to fraction form
    51,400.60/70,928.88 = 31,254.72/x
  3. Step 3: Cross multiply
    51,400.60x = 70,928.88 × 31,254.72
  4. Step 4: Simplify right side
    51,400.60x = 2,216,862,284.31
  5. Step 5: Solve for x
    x = 2,216,862,284.31/51,400.60
  6. Step 6: Final answer
    x = 43,129.11

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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.