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Finding the Fourth Proportional to 128,242.67, 192,303.45 and 74,949.93

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Solution

The fourth proportional to 128,242.67, 192,303.45 and 74,949.93 is: 112,389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,242.67 : 192,303.45 = 74,949.93 : x
  2. Step 2: Convert to fraction form
    128,242.67/192,303.45 = 74,949.93/x
  3. Step 3: Cross multiply
    128,242.67x = 192,303.45 × 74,949.93
  4. Step 4: Simplify right side
    128,242.67x = 14,413,130,116.26
  5. Step 5: Solve for x
    x = 14,413,130,116.26/128,242.67
  6. Step 6: Final answer
    x = 112,389.51

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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.