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Finding the Fourth Proportional to 93,459.26, 128,972.12 and 53,172.16

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Solution

The fourth proportional to 93,459.26, 128,972.12 and 53,172.16 is: 73,376.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,459.26 : 128,972.12 = 53,172.16 : x
  2. Step 2: Convert to fraction form
    93,459.26/128,972.12 = 53,172.16/x
  3. Step 3: Cross multiply
    93,459.26x = 128,972.12 × 53,172.16
  4. Step 4: Simplify right side
    93,459.26x = 6,857,725,611.89
  5. Step 5: Solve for x
    x = 6,857,725,611.89/93,459.26
  6. Step 6: Final answer
    x = 73,376.63

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1.5x scale

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.