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Finding the Fourth Proportional to 93,000, 128,342.88 and 53,256

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Solution

The fourth proportional to 93,000, 128,342.88 and 53,256 is: 73,494.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,000 : 128,342.88 = 53,256 : x
  2. Step 2: Convert to fraction form
    93,000/128,342.88 = 53,256/x
  3. Step 3: Cross multiply
    93,000x = 128,342.88 × 53,256
  4. Step 4: Simplify right side
    93,000x = 6,835,028,417.28
  5. Step 5: Solve for x
    x = 6,835,028,417.28/93,000
  6. Step 6: Final answer
    x = 73,494.93

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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.