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Finding the Fourth Proportional to 85,827.80, 128,741.70 and 50,749.40

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Solution

The fourth proportional to 85,827.80, 128,741.70 and 50,749.40 is: 76,124.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,827.80 : 128,741.70 = 50,749.40 : x
  2. Step 2: Convert to fraction form
    85,827.80/128,741.70 = 50,749.40/x
  3. Step 3: Cross multiply
    85,827.80x = 128,741.70 × 50,749.40
  4. Step 4: Simplify right side
    85,827.80x = 6,533,564,029.98
  5. Step 5: Solve for x
    x = 6,533,564,029.98/85,827.80
  6. Step 6: Final answer
    x = 76,124.10

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1.5x scale

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.