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Finding the Fourth Proportional to 93,441.64, 128,980.74 and 57,615.88

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Solution

The fourth proportional to 93,441.64, 128,980.74 and 57,615.88 is: 79,529.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,441.64 : 128,980.74 = 57,615.88 : x
  2. Step 2: Convert to fraction form
    93,441.64/128,980.74 = 57,615.88/x
  3. Step 3: Cross multiply
    93,441.64x = 128,980.74 × 57,615.88
  4. Step 4: Simplify right side
    93,441.64x = 7,431,338,838.15
  5. Step 5: Solve for x
    x = 7,431,338,838.15/93,441.64
  6. Step 6: Final answer
    x = 79,529.20

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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.