Home / 105,328.40-145,354.92-62,890.64

Finding the Fourth Proportional to 105,328.40, 145,354.92 and 62,890.64

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Solution

The fourth proportional to 105,328.40, 145,354.92 and 62,890.64 is: 86,790.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,328.40 : 145,354.92 = 62,890.64 : x
  2. Step 2: Convert to fraction form
    105,328.40/145,354.92 = 62,890.64/x
  3. Step 3: Cross multiply
    105,328.40x = 145,354.92 × 62,890.64
  4. Step 4: Simplify right side
    105,328.40x = 9,141,463,945.95
  5. Step 5: Solve for x
    x = 9,141,463,945.95/105,328.40
  6. Step 6: Final answer
    x = 86,790.11

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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.