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Finding the Fourth Proportional to 93,406.86, 128,904.32 and 53,126.43

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Solution

The fourth proportional to 93,406.86, 128,904.32 and 53,126.43 is: 73,316.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,406.86 : 128,904.32 = 53,126.43 : x
  2. Step 2: Convert to fraction form
    93,406.86/128,904.32 = 53,126.43/x
  3. Step 3: Cross multiply
    93,406.86x = 128,904.32 × 53,126.43
  4. Step 4: Simplify right side
    93,406.86x = 6,848,226,333.18
  5. Step 5: Solve for x
    x = 6,848,226,333.18/93,406.86
  6. Step 6: Final answer
    x = 73,316.10

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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.