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Finding the Fourth Proportional to 128,312.15, 192,187.75 and 65,023.64

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Solution

The fourth proportional to 128,312.15, 192,187.75 and 65,023.64 is: 97,393.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312.15 : 192,187.75 = 65,023.64 : x
  2. Step 2: Convert to fraction form
    128,312.15/192,187.75 = 65,023.64/x
  3. Step 3: Cross multiply
    128,312.15x = 192,187.75 × 65,023.64
  4. Step 4: Simplify right side
    128,312.15x = 12,496,747,068.41
  5. Step 5: Solve for x
    x = 12,496,747,068.41/128,312.15
  6. Step 6: Final answer
    x = 97,393.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.