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Finding the Fourth Proportional to 93,390.96, 128,876.76 and 53,109.12

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Solution

The fourth proportional to 93,390.96, 128,876.76 and 53,109.12 is: 73,289.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,390.96 : 128,876.76 = 53,109.12 : x
  2. Step 2: Convert to fraction form
    93,390.96/128,876.76 = 53,109.12/x
  3. Step 3: Cross multiply
    93,390.96x = 128,876.76 × 53,109.12
  4. Step 4: Simplify right side
    93,390.96x = 6,844,531,312.05
  5. Step 5: Solve for x
    x = 6,844,531,312.05/93,390.96
  6. Step 6: Final answer
    x = 73,289.01

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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.