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Finding the Fourth Proportional to 139,437.51, 192,424.98 and 75,775.30

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Solution

The fourth proportional to 139,437.51, 192,424.98 and 75,775.30 is: 104,570.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,437.51 : 192,424.98 = 75,775.30 : x
  2. Step 2: Convert to fraction form
    139,437.51/192,424.98 = 75,775.30/x
  3. Step 3: Cross multiply
    139,437.51x = 192,424.98 × 75,775.30
  4. Step 4: Simplify right side
    139,437.51x = 14,581,060,586.99
  5. Step 5: Solve for x
    x = 14,581,060,586.99/139,437.51
  6. Step 6: Final answer
    x = 104,570.57

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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.