Home / 77,208.72-115,164-70,121.76

Finding the Fourth Proportional to 77,208.72, 115,164 and 70,121.76

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Solution

The fourth proportional to 77,208.72, 115,164 and 70,121.76 is: 104,593.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,208.72 : 115,164 = 70,121.76 : x
  2. Step 2: Convert to fraction form
    77,208.72/115,164 = 70,121.76/x
  3. Step 3: Cross multiply
    77,208.72x = 115,164 × 70,121.76
  4. Step 4: Simplify right side
    77,208.72x = 8,075,502,368.64
  5. Step 5: Solve for x
    x = 8,075,502,368.64/77,208.72
  6. Step 6: Final answer
    x = 104,593.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.