Home / 149,123.08-205,783.66-81,140.32

Finding the Fourth Proportional to 149,123.08, 205,783.66 and 81,140.32

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Solution

The fourth proportional to 149,123.08, 205,783.66 and 81,140.32 is: 111,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,123.08 : 205,783.66 = 81,140.32 : x
  2. Step 2: Convert to fraction form
    149,123.08/205,783.66 = 81,140.32/x
  3. Step 3: Cross multiply
    149,123.08x = 205,783.66 × 81,140.32
  4. Step 4: Simplify right side
    149,123.08x = 16,697,351,617.47
  5. Step 5: Solve for x
    x = 16,697,351,617.47/149,123.08
  6. Step 6: Final answer
    x = 111,970.27

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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.