Home / 153,840.12-212,310.03-85,870.37

Finding the Fourth Proportional to 153,840.12, 212,310.03 and 85,870.37

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Solution

The fourth proportional to 153,840.12, 212,310.03 and 85,870.37 is: 118,507.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,840.12 : 212,310.03 = 85,870.37 : x
  2. Step 2: Convert to fraction form
    153,840.12/212,310.03 = 85,870.37/x
  3. Step 3: Cross multiply
    153,840.12x = 212,310.03 × 85,870.37
  4. Step 4: Simplify right side
    153,840.12x = 18,231,139,769.26
  5. Step 5: Solve for x
    x = 18,231,139,769.26/153,840.12
  6. Step 6: Final answer
    x = 118,507.06

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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.