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Finding the Fourth Proportional to 57,090.40, 85,705.80 and 36,030.40

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Solution

The fourth proportional to 57,090.40, 85,705.80 and 36,030.40 is: 54,089.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,090.40 : 85,705.80 = 36,030.40 : x
  2. Step 2: Convert to fraction form
    57,090.40/85,705.80 = 36,030.40/x
  3. Step 3: Cross multiply
    57,090.40x = 85,705.80 × 36,030.40
  4. Step 4: Simplify right side
    57,090.40x = 3,088,014,256.32
  5. Step 5: Solve for x
    x = 3,088,014,256.32/57,090.40
  6. Step 6: Final answer
    x = 54,089.90

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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.