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Finding the Fourth Proportional to 254,158.93, 381,127.63 and 85,647.85

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Solution

The fourth proportional to 254,158.93, 381,127.63 and 85,647.85 is: 128,434.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,158.93 : 381,127.63 = 85,647.85 : x
  2. Step 2: Convert to fraction form
    254,158.93/381,127.63 = 85,647.85/x
  3. Step 3: Cross multiply
    254,158.93x = 381,127.63 × 85,647.85
  4. Step 4: Simplify right side
    254,158.93x = 32,642,762,085.10
  5. Step 5: Solve for x
    x = 32,642,762,085.10/254,158.93
  6. Step 6: Final answer
    x = 128,434.45

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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.