Home / 153,865.51-212,345.10-85,895.75

Finding the Fourth Proportional to 153,865.51, 212,345.10 and 85,895.75

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Solution

The fourth proportional to 153,865.51, 212,345.10 and 85,895.75 is: 118,542.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,865.51 : 212,345.10 = 85,895.75 : x
  2. Step 2: Convert to fraction form
    153,865.51/212,345.10 = 85,895.75/x
  3. Step 3: Cross multiply
    153,865.51x = 212,345.10 × 85,895.75
  4. Step 4: Simplify right side
    153,865.51x = 18,239,541,623.33
  5. Step 5: Solve for x
    x = 18,239,541,623.33/153,865.51
  6. Step 6: Final answer
    x = 118,542.11

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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.