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Finding the Fourth Proportional to 93,212.60, 128,615.68 and 54,984.16

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Solution

The fourth proportional to 93,212.60, 128,615.68 and 54,984.16 is: 75,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,212.60 : 128,615.68 = 54,984.16 : x
  2. Step 2: Convert to fraction form
    93,212.60/128,615.68 = 54,984.16/x
  3. Step 3: Cross multiply
    93,212.60x = 128,615.68 × 54,984.16
  4. Step 4: Simplify right side
    93,212.60x = 7,071,825,127.63
  5. Step 5: Solve for x
    x = 7,071,825,127.63/93,212.60
  6. Step 6: Final answer
    x = 75,867.70

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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.