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Finding the Fourth Proportional to 310,595.25, 465,903.21 and 85,936.86

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Solution

The fourth proportional to 310,595.25, 465,903.21 and 85,936.86 is: 128,908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,595.25 : 465,903.21 = 85,936.86 : x
  2. Step 2: Convert to fraction form
    310,595.25/465,903.21 = 85,936.86/x
  3. Step 3: Cross multiply
    310,595.25x = 465,903.21 × 85,936.86
  4. Step 4: Simplify right side
    310,595.25x = 40,038,258,931.32
  5. Step 5: Solve for x
    x = 40,038,258,931.32/310,595.25
  6. Step 6: Final answer
    x = 128,908.15

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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.