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Finding the Fourth Proportional to 210,056.60, 315,084.90 and 131,259.80

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Solution

The fourth proportional to 210,056.60, 315,084.90 and 131,259.80 is: 196,889.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,056.60 : 315,084.90 = 131,259.80 : x
  2. Step 2: Convert to fraction form
    210,056.60/315,084.90 = 131,259.80/x
  3. Step 3: Cross multiply
    210,056.60x = 315,084.90 × 131,259.80
  4. Step 4: Simplify right side
    210,056.60x = 41,357,980,957.02
  5. Step 5: Solve for x
    x = 41,357,980,957.02/210,056.60
  6. Step 6: Final answer
    x = 196,889.70

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1.5x scale

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.