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Finding the Fourth Proportional to 93,160, 128,568.48 and 53,423.68

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Solution

The fourth proportional to 93,160, 128,568.48 and 53,423.68 is: 73,729.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,160 : 128,568.48 = 53,423.68 : x
  2. Step 2: Convert to fraction form
    93,160/128,568.48 = 53,423.68/x
  3. Step 3: Cross multiply
    93,160x = 128,568.48 × 53,423.68
  4. Step 4: Simplify right side
    93,160x = 6,868,601,333.61
  5. Step 5: Solve for x
    x = 6,868,601,333.61/93,160
  6. Step 6: Final answer
    x = 73,729.08

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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.