Home / 84,999.58-128,005.38-74,038.66

Finding the Fourth Proportional to 84,999.58, 128,005.38 and 74,038.66

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Solution

The fourth proportional to 84,999.58, 128,005.38 and 74,038.66 is: 111,498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,999.58 : 128,005.38 = 74,038.66 : x
  2. Step 2: Convert to fraction form
    84,999.58/128,005.38 = 74,038.66/x
  3. Step 3: Cross multiply
    84,999.58x = 128,005.38 × 74,038.66
  4. Step 4: Simplify right side
    84,999.58x = 9,477,346,487.98
  5. Step 5: Solve for x
    x = 9,477,346,487.98/84,999.58
  6. Step 6: Final answer
    x = 111,498.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.