Home / 154,045.48-212,588.40-85,135.54

Finding the Fourth Proportional to 154,045.48, 212,588.40 and 85,135.54

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Solution

The fourth proportional to 154,045.48, 212,588.40 and 85,135.54 is: 117,490.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,045.48 : 212,588.40 = 85,135.54 : x
  2. Step 2: Convert to fraction form
    154,045.48/212,588.40 = 85,135.54/x
  3. Step 3: Cross multiply
    154,045.48x = 212,588.40 × 85,135.54
  4. Step 4: Simplify right side
    154,045.48x = 18,098,828,231.74
  5. Step 5: Solve for x
    x = 18,098,828,231.74/154,045.48
  6. Step 6: Final answer
    x = 117,490.16

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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.