Home / 105,688.40-145,849.95-57,940.72

Finding the Fourth Proportional to 105,688.40, 145,849.95 and 57,940.72

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Solution

The fourth proportional to 105,688.40, 145,849.95 and 57,940.72 is: 79,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,688.40 : 145,849.95 = 57,940.72 : x
  2. Step 2: Convert to fraction form
    105,688.40/145,849.95 = 57,940.72/x
  3. Step 3: Cross multiply
    105,688.40x = 145,849.95 × 57,940.72
  4. Step 4: Simplify right side
    105,688.40x = 8,450,650,750.34
  5. Step 5: Solve for x
    x = 8,450,650,750.34/105,688.40
  6. Step 6: Final answer
    x = 79,958.17

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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.