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Finding the Fourth Proportional to 93,126.81, 128,515 and 50,685.65

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Solution

The fourth proportional to 93,126.81, 128,515 and 50,685.65 is: 69,946.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,126.81 : 128,515 = 50,685.65 : x
  2. Step 2: Convert to fraction form
    93,126.81/128,515 = 50,685.65/x
  3. Step 3: Cross multiply
    93,126.81x = 128,515 × 50,685.65
  4. Step 4: Simplify right side
    93,126.81x = 6,513,866,309.75
  5. Step 5: Solve for x
    x = 6,513,866,309.75/93,126.81
  6. Step 6: Final answer
    x = 69,946.20

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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.