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Finding the Fourth Proportional to 93,459.15, 128,969.13 and 53,169.12

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Solution

The fourth proportional to 93,459.15, 128,969.13 and 53,169.12 is: 73,370.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,459.15 : 128,969.13 = 53,169.12 : x
  2. Step 2: Convert to fraction form
    93,459.15/128,969.13 = 53,169.12/x
  3. Step 3: Cross multiply
    93,459.15x = 128,969.13 × 53,169.12
  4. Step 4: Simplify right side
    93,459.15x = 6,857,175,149.27
  5. Step 5: Solve for x
    x = 6,857,175,149.27/93,459.15
  6. Step 6: Final answer
    x = 73,370.83

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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.