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Finding the Fourth Proportional to 93,191, 128,615.73 and 55,465.25

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Solution

The fourth proportional to 93,191, 128,615.73 and 55,465.25 is: 76,549.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,191 : 128,615.73 = 55,465.25 : x
  2. Step 2: Convert to fraction form
    93,191/128,615.73 = 55,465.25/x
  3. Step 3: Cross multiply
    93,191x = 128,615.73 × 55,465.25
  4. Step 4: Simplify right side
    93,191x = 7,133,703,618.38
  5. Step 5: Solve for x
    x = 7,133,703,618.38/93,191
  6. Step 6: Final answer
    x = 76,549.28

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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.