Home / 99,771.78-137,688.27-56,750.16

Finding the Fourth Proportional to 99,771.78, 137,688.27 and 56,750.16

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Solution

The fourth proportional to 99,771.78, 137,688.27 and 56,750.16 is: 78,317.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,771.78 : 137,688.27 = 56,750.16 : x
  2. Step 2: Convert to fraction form
    99,771.78/137,688.27 = 56,750.16/x
  3. Step 3: Cross multiply
    99,771.78x = 137,688.27 × 56,750.16
  4. Step 4: Simplify right side
    99,771.78x = 7,813,830,664.18
  5. Step 5: Solve for x
    x = 7,813,830,664.18/99,771.78
  6. Step 6: Final answer
    x = 78,317.05

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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.