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Finding the Fourth Proportional to 85,903.10, 128,829.86 and 29,740.94

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Solution

The fourth proportional to 85,903.10, 128,829.86 and 29,740.94 is: 44,602.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,903.10 : 128,829.86 = 29,740.94 : x
  2. Step 2: Convert to fraction form
    85,903.10/128,829.86 = 29,740.94/x
  3. Step 3: Cross multiply
    85,903.10x = 128,829.86 × 29,740.94
  4. Step 4: Simplify right side
    85,903.10x = 3,831,521,136.47
  5. Step 5: Solve for x
    x = 3,831,521,136.47/85,903.10
  6. Step 6: Final answer
    x = 44,602.83

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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.