Home / 85,425.03-128,064.65-60,386.31

Finding the Fourth Proportional to 85,425.03, 128,064.65 and 60,386.31

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Solution

The fourth proportional to 85,425.03, 128,064.65 and 60,386.31 is: 90,527.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,425.03 : 128,064.65 = 60,386.31 : x
  2. Step 2: Convert to fraction form
    85,425.03/128,064.65 = 60,386.31/x
  3. Step 3: Cross multiply
    85,425.03x = 128,064.65 × 60,386.31
  4. Step 4: Simplify right side
    85,425.03x = 7,733,351,353.01
  5. Step 5: Solve for x
    x = 7,733,351,353.01/85,425.03
  6. Step 6: Final answer
    x = 90,527.93

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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.