Home / 81,411.30-121,906.64-56,188.67

Finding the Fourth Proportional to 81,411.30, 121,906.64 and 56,188.67

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Solution

The fourth proportional to 81,411.30, 121,906.64 and 56,188.67 is: 84,137.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,411.30 : 121,906.64 = 56,188.67 : x
  2. Step 2: Convert to fraction form
    81,411.30/121,906.64 = 56,188.67/x
  3. Step 3: Cross multiply
    81,411.30x = 121,906.64 × 56,188.67
  4. Step 4: Simplify right side
    81,411.30x = 6,849,771,075.29
  5. Step 5: Solve for x
    x = 6,849,771,075.29/81,411.30
  6. Step 6: Final answer
    x = 84,137.84

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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.