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Finding the Fourth Proportional to 128,437.51, 192,574.23 and 61,744.93

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Solution

The fourth proportional to 128,437.51, 192,574.23 and 61,744.93 is: 92,577.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,437.51 : 192,574.23 = 61,744.93 : x
  2. Step 2: Convert to fraction form
    128,437.51/192,574.23 = 61,744.93/x
  3. Step 3: Cross multiply
    128,437.51x = 192,574.23 × 61,744.93
  4. Step 4: Simplify right side
    128,437.51x = 11,890,482,351.15
  5. Step 5: Solve for x
    x = 11,890,482,351.15/128,437.51
  6. Step 6: Final answer
    x = 92,577.96

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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.