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Finding the Fourth Proportional to 251,813.64, 347,501.70 and 138,636.30

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Solution

The fourth proportional to 251,813.64, 347,501.70 and 138,636.30 is: 191,317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,813.64 : 347,501.70 = 138,636.30 : x
  2. Step 2: Convert to fraction form
    251,813.64/347,501.70 = 138,636.30/x
  3. Step 3: Cross multiply
    251,813.64x = 347,501.70 × 138,636.30
  4. Step 4: Simplify right side
    251,813.64x = 48,176,349,931.71
  5. Step 5: Solve for x
    x = 48,176,349,931.71/251,813.64
  6. Step 6: Final answer
    x = 191,317.48

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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.