Home / 85,406.03-128,056.47-58,784.31

Finding the Fourth Proportional to 85,406.03, 128,056.47 and 58,784.31

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Solution

The fourth proportional to 85,406.03, 128,056.47 and 58,784.31 is: 88,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.03 : 128,056.47 = 58,784.31 : x
  2. Step 2: Convert to fraction form
    85,406.03/128,056.47 = 58,784.31/x
  3. Step 3: Cross multiply
    85,406.03x = 128,056.47 × 58,784.31
  4. Step 4: Simplify right side
    85,406.03x = 7,527,711,229.99
  5. Step 5: Solve for x
    x = 7,527,711,229.99/85,406.03
  6. Step 6: Final answer
    x = 88,140.28

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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.