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Finding the Fourth Proportional to 72,485.42, 100,030.85 and 54,303.85

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Solution

The fourth proportional to 72,485.42, 100,030.85 and 54,303.85 is: 74,940.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485.42 : 100,030.85 = 54,303.85 : x
  2. Step 2: Convert to fraction form
    72,485.42/100,030.85 = 54,303.85/x
  3. Step 3: Cross multiply
    72,485.42x = 100,030.85 × 54,303.85
  4. Step 4: Simplify right side
    72,485.42x = 5,432,060,330.93
  5. Step 5: Solve for x
    x = 5,432,060,330.93/72,485.42
  6. Step 6: Final answer
    x = 74,940.05

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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.