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Finding the Fourth Proportional to 153,674.40, 212,086.80 and 115,888.80

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Solution

The fourth proportional to 153,674.40, 212,086.80 and 115,888.80 is: 159,938.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,674.40 : 212,086.80 = 115,888.80 : x
  2. Step 2: Convert to fraction form
    153,674.40/212,086.80 = 115,888.80/x
  3. Step 3: Cross multiply
    153,674.40x = 212,086.80 × 115,888.80
  4. Step 4: Simplify right side
    153,674.40x = 24,578,484,747.84
  5. Step 5: Solve for x
    x = 24,578,484,747.84/153,674.40
  6. Step 6: Final answer
    x = 159,938.71

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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.