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Finding the Fourth Proportional to 85,820.40, 128,730.60 and 59,576.40

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Solution

The fourth proportional to 85,820.40, 128,730.60 and 59,576.40 is: 89,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,820.40 : 128,730.60 = 59,576.40 : x
  2. Step 2: Convert to fraction form
    85,820.40/128,730.60 = 59,576.40/x
  3. Step 3: Cross multiply
    85,820.40x = 128,730.60 × 59,576.40
  4. Step 4: Simplify right side
    85,820.40x = 7,669,305,717.84
  5. Step 5: Solve for x
    x = 7,669,305,717.84/85,820.40
  6. Step 6: Final answer
    x = 89,364.60

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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.