Home / 138,612.02-191,283.64-78,183.15

Finding the Fourth Proportional to 138,612.02, 191,283.64 and 78,183.15

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Solution

The fourth proportional to 138,612.02, 191,283.64 and 78,183.15 is: 107,892.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.02 : 191,283.64 = 78,183.15 : x
  2. Step 2: Convert to fraction form
    138,612.02/191,283.64 = 78,183.15/x
  3. Step 3: Cross multiply
    138,612.02x = 191,283.64 × 78,183.15
  4. Step 4: Simplify right side
    138,612.02x = 14,955,157,518.67
  5. Step 5: Solve for x
    x = 14,955,157,518.67/138,612.02
  6. Step 6: Final answer
    x = 107,892.21

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1.5x scale

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.