Home / 105,730.72-145,910.40-57,981.20

Finding the Fourth Proportional to 105,730.72, 145,910.40 and 57,981.20

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Solution

The fourth proportional to 105,730.72, 145,910.40 and 57,981.20 is: 80,015.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,730.72 : 145,910.40 = 57,981.20 : x
  2. Step 2: Convert to fraction form
    105,730.72/145,910.40 = 57,981.20/x
  3. Step 3: Cross multiply
    105,730.72x = 145,910.40 × 57,981.20
  4. Step 4: Simplify right side
    105,730.72x = 8,460,060,084.48
  5. Step 5: Solve for x
    x = 8,460,060,084.48/105,730.72
  6. Step 6: Final answer
    x = 80,015.16

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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.