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Finding the Fourth Proportional to 85,605.90, 128,430.72 and 33,001.26

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Solution

The fourth proportional to 85,605.90, 128,430.72 and 33,001.26 is: 49,510.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,605.90 : 128,430.72 = 33,001.26 : x
  2. Step 2: Convert to fraction form
    85,605.90/128,430.72 = 33,001.26/x
  3. Step 3: Cross multiply
    85,605.90x = 128,430.72 × 33,001.26
  4. Step 4: Simplify right side
    85,605.90x = 4,238,375,582.71
  5. Step 5: Solve for x
    x = 4,238,375,582.71/85,605.90
  6. Step 6: Final answer
    x = 49,510.32

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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.