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Finding the Fourth Proportional to 159,316.32, 219,830.80 and 91,320.80

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Solution

The fourth proportional to 159,316.32, 219,830.80 and 91,320.80 is: 126,007.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,316.32 : 219,830.80 = 91,320.80 : x
  2. Step 2: Convert to fraction form
    159,316.32/219,830.80 = 91,320.80/x
  3. Step 3: Cross multiply
    159,316.32x = 219,830.80 × 91,320.80
  4. Step 4: Simplify right side
    159,316.32x = 20,075,124,520.64
  5. Step 5: Solve for x
    x = 20,075,124,520.64/159,316.32
  6. Step 6: Final answer
    x = 126,007.96

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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.