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Finding the Fourth Proportional to 93,231.68, 128,661.12 and 50,790.20

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Solution

The fourth proportional to 93,231.68, 128,661.12 and 50,790.20 is: 70,091.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,231.68 : 128,661.12 = 50,790.20 : x
  2. Step 2: Convert to fraction form
    93,231.68/128,661.12 = 50,790.20/x
  3. Step 3: Cross multiply
    93,231.68x = 128,661.12 × 50,790.20
  4. Step 4: Simplify right side
    93,231.68x = 6,534,724,017.02
  5. Step 5: Solve for x
    x = 6,534,724,017.02/93,231.68
  6. Step 6: Final answer
    x = 70,091.24

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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.