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Finding the Fourth Proportional to 102,485.20, 153,727.80 and 36,000.40

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Solution

The fourth proportional to 102,485.20, 153,727.80 and 36,000.40 is: 54,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,485.20 : 153,727.80 = 36,000.40 : x
  2. Step 2: Convert to fraction form
    102,485.20/153,727.80 = 36,000.40/x
  3. Step 3: Cross multiply
    102,485.20x = 153,727.80 × 36,000.40
  4. Step 4: Simplify right side
    102,485.20x = 5,534,262,291.12
  5. Step 5: Solve for x
    x = 5,534,262,291.12/102,485.20
  6. Step 6: Final answer
    x = 54,000.60

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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.