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Finding the Fourth Proportional to 158,559.79, 218,814.63 and 86,939.63

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Solution

The fourth proportional to 158,559.79, 218,814.63 and 86,939.63 is: 119,977.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,559.79 : 218,814.63 = 86,939.63 : x
  2. Step 2: Convert to fraction form
    158,559.79/218,814.63 = 86,939.63/x
  3. Step 3: Cross multiply
    158,559.79x = 218,814.63 × 86,939.63
  4. Step 4: Simplify right side
    158,559.79x = 19,023,662,970.79
  5. Step 5: Solve for x
    x = 19,023,662,970.79/158,559.79
  6. Step 6: Final answer
    x = 119,977.85

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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.