Home / 85,749.23-128,638.31-29,574.31

Finding the Fourth Proportional to 85,749.23, 128,638.31 and 29,574.31

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Solution

The fourth proportional to 85,749.23, 128,638.31 and 29,574.31 is: 44,366.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.23 : 128,638.31 = 29,574.31 : x
  2. Step 2: Convert to fraction form
    85,749.23/128,638.31 = 29,574.31/x
  3. Step 3: Cross multiply
    85,749.23x = 128,638.31 × 29,574.31
  4. Step 4: Simplify right side
    85,749.23x = 3,804,389,381.65
  5. Step 5: Solve for x
    x = 3,804,389,381.65/85,749.23
  6. Step 6: Final answer
    x = 44,366.46

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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.