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Finding the Fourth Proportional to 51,312.59, 70,812.57 and 28,650.81

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Solution

The fourth proportional to 51,312.59, 70,812.57 and 28,650.81 is: 39,538.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,312.59 : 70,812.57 = 28,650.81 : x
  2. Step 2: Convert to fraction form
    51,312.59/70,812.57 = 28,650.81/x
  3. Step 3: Cross multiply
    51,312.59x = 70,812.57 × 28,650.81
  4. Step 4: Simplify right side
    51,312.59x = 2,028,837,488.68
  5. Step 5: Solve for x
    x = 2,028,837,488.68/51,312.59
  6. Step 6: Final answer
    x = 39,538.79

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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.