Home / 85,669.78-128,430.75-41,235.34

Finding the Fourth Proportional to 85,669.78, 128,430.75 and 41,235.34

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Solution

The fourth proportional to 85,669.78, 128,430.75 and 41,235.34 is: 61,817.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,669.78 : 128,430.75 = 41,235.34 : x
  2. Step 2: Convert to fraction form
    85,669.78/128,430.75 = 41,235.34/x
  3. Step 3: Cross multiply
    85,669.78x = 128,430.75 × 41,235.34
  4. Step 4: Simplify right side
    85,669.78x = 5,295,885,642.71
  5. Step 5: Solve for x
    x = 5,295,885,642.71/85,669.78
  6. Step 6: Final answer
    x = 61,817.43

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1.5x scale

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.