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Finding the Fourth Proportional to 77,075.67, 106,363.60 and 45,238.42

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Solution

The fourth proportional to 77,075.67, 106,363.60 and 45,238.42 is: 62,428.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,075.67 : 106,363.60 = 45,238.42 : x
  2. Step 2: Convert to fraction form
    77,075.67/106,363.60 = 45,238.42/x
  3. Step 3: Cross multiply
    77,075.67x = 106,363.60 × 45,238.42
  4. Step 4: Simplify right side
    77,075.67x = 4,811,721,209.51
  5. Step 5: Solve for x
    x = 4,811,721,209.51/77,075.67
  6. Step 6: Final answer
    x = 62,428.54

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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.