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Finding the Fourth Proportional to 77,085.47, 115,637.47 and 27,155.25

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Solution

The fourth proportional to 77,085.47, 115,637.47 and 27,155.25 is: 40,736.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,085.47 : 115,637.47 = 27,155.25 : x
  2. Step 2: Convert to fraction form
    77,085.47/115,637.47 = 27,155.25/x
  3. Step 3: Cross multiply
    77,085.47x = 115,637.47 × 27,155.25
  4. Step 4: Simplify right side
    77,085.47x = 3,140,163,693.25
  5. Step 5: Solve for x
    x = 3,140,163,693.25/77,085.47
  6. Step 6: Final answer
    x = 40,736.13

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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.