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Finding the Fourth Proportional to 90,590.40, 135,901.80 and 38,005.20

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Solution

The fourth proportional to 90,590.40, 135,901.80 and 38,005.20 is: 57,014.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,590.40 : 135,901.80 = 38,005.20 : x
  2. Step 2: Convert to fraction form
    90,590.40/135,901.80 = 38,005.20/x
  3. Step 3: Cross multiply
    90,590.40x = 135,901.80 × 38,005.20
  4. Step 4: Simplify right side
    90,590.40x = 5,164,975,089.36
  5. Step 5: Solve for x
    x = 5,164,975,089.36/90,590.40
  6. Step 6: Final answer
    x = 57,014.60

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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.