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Finding the Fourth Proportional to 93,153.78, 128,548.35 and 50,712.35

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Solution

The fourth proportional to 93,153.78, 128,548.35 and 50,712.35 is: 69,980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,153.78 : 128,548.35 = 50,712.35 : x
  2. Step 2: Convert to fraction form
    93,153.78/128,548.35 = 50,712.35/x
  3. Step 3: Cross multiply
    93,153.78x = 128,548.35 × 50,712.35
  4. Step 4: Simplify right side
    93,153.78x = 6,518,988,274.38
  5. Step 5: Solve for x
    x = 6,518,988,274.38/93,153.78
  6. Step 6: Final answer
    x = 69,980.93

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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.