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Finding the Fourth Proportional to 85,802.14, 128,751.54 and 67,029.51

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Solution

The fourth proportional to 85,802.14, 128,751.54 and 67,029.51 is: 100,582.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,802.14 : 128,751.54 = 67,029.51 : x
  2. Step 2: Convert to fraction form
    85,802.14/128,751.54 = 67,029.51/x
  3. Step 3: Cross multiply
    85,802.14x = 128,751.54 × 67,029.51
  4. Step 4: Simplify right side
    85,802.14x = 8,630,152,637.95
  5. Step 5: Solve for x
    x = 8,630,152,637.95/85,802.14
  6. Step 6: Final answer
    x = 100,582.02

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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.