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Finding the Fourth Proportional to 77,210.87, 106,552.80 and 43,218.51

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Solution

The fourth proportional to 77,210.87, 106,552.80 and 43,218.51 is: 59,642.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,210.87 : 106,552.80 = 43,218.51 : x
  2. Step 2: Convert to fraction form
    77,210.87/106,552.80 = 43,218.51/x
  3. Step 3: Cross multiply
    77,210.87x = 106,552.80 × 43,218.51
  4. Step 4: Simplify right side
    77,210.87x = 4,605,052,503.47
  5. Step 5: Solve for x
    x = 4,605,052,503.47/77,210.87
  6. Step 6: Final answer
    x = 59,642.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.