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Finding the Fourth Proportional to 157,325.95, 217,108.96 and 85,705.80

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Solution

The fourth proportional to 157,325.95, 217,108.96 and 85,705.80 is: 118,273.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,325.95 : 217,108.96 = 85,705.80 : x
  2. Step 2: Convert to fraction form
    157,325.95/217,108.96 = 85,705.80/x
  3. Step 3: Cross multiply
    157,325.95x = 217,108.96 × 85,705.80
  4. Step 4: Simplify right side
    157,325.95x = 18,607,496,075.54
  5. Step 5: Solve for x
    x = 18,607,496,075.54/157,325.95
  6. Step 6: Final answer
    x = 118,273.54

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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.