Home / 105,140.80-157,612.35-51,812.20

Finding the Fourth Proportional to 105,140.80, 157,612.35 and 51,812.20

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Solution

The fourth proportional to 105,140.80, 157,612.35 and 51,812.20 is: 77,669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,140.80 : 157,612.35 = 51,812.20 : x
  2. Step 2: Convert to fraction form
    105,140.80/157,612.35 = 51,812.20/x
  3. Step 3: Cross multiply
    105,140.80x = 157,612.35 × 51,812.20
  4. Step 4: Simplify right side
    105,140.80x = 8,166,242,600.67
  5. Step 5: Solve for x
    x = 8,166,242,600.67/105,140.80
  6. Step 6: Final answer
    x = 77,669.59

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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.