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Finding the Fourth Proportional to 93,287.16, 128,739.78 and 53,007.78

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Solution

The fourth proportional to 93,287.16, 128,739.78 and 53,007.78 is: 73,152.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,287.16 : 128,739.78 = 53,007.78 : x
  2. Step 2: Convert to fraction form
    93,287.16/128,739.78 = 53,007.78/x
  3. Step 3: Cross multiply
    93,287.16x = 128,739.78 × 53,007.78
  4. Step 4: Simplify right side
    93,287.16x = 6,824,209,935.49
  5. Step 5: Solve for x
    x = 6,824,209,935.49/93,287.16
  6. Step 6: Final answer
    x = 73,152.72

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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.