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Finding the Fourth Proportional to 93,038.54, 128,429.66 and 65,956.16

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Solution

The fourth proportional to 93,038.54, 128,429.66 and 65,956.16 is: 91,045.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,038.54 : 128,429.66 = 65,956.16 : x
  2. Step 2: Convert to fraction form
    93,038.54/128,429.66 = 65,956.16/x
  3. Step 3: Cross multiply
    93,038.54x = 128,429.66 × 65,956.16
  4. Step 4: Simplify right side
    93,038.54x = 8,470,727,689.67
  5. Step 5: Solve for x
    x = 8,470,727,689.67/93,038.54
  6. Step 6: Final answer
    x = 91,045.37

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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.