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Finding the Fourth Proportional to 70,312.42, 105,482.73 and 25,939.40

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Solution

The fourth proportional to 70,312.42, 105,482.73 and 25,939.40 is: 38,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,312.42 : 105,482.73 = 25,939.40 : x
  2. Step 2: Convert to fraction form
    70,312.42/105,482.73 = 25,939.40/x
  3. Step 3: Cross multiply
    70,312.42x = 105,482.73 × 25,939.40
  4. Step 4: Simplify right side
    70,312.42x = 2,736,158,726.56
  5. Step 5: Solve for x
    x = 2,736,158,726.56/70,312.42
  6. Step 6: Final answer
    x = 38,914.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.