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Finding the Fourth Proportional to 93,115.86, 128,502.78 and 52,831.32

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Solution

The fourth proportional to 93,115.86, 128,502.78 and 52,831.32 is: 72,908.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,115.86 : 128,502.78 = 52,831.32 : x
  2. Step 2: Convert to fraction form
    93,115.86/128,502.78 = 52,831.32/x
  3. Step 3: Cross multiply
    93,115.86x = 128,502.78 × 52,831.32
  4. Step 4: Simplify right side
    93,115.86x = 6,788,971,491.07
  5. Step 5: Solve for x
    x = 6,788,971,491.07/93,115.86
  6. Step 6: Final answer
    x = 72,908.86

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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.