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Finding the Fourth Proportional to 71,075.78, 98,085.84 and 39,242.78

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Solution

The fourth proportional to 71,075.78, 98,085.84 and 39,242.78 is: 54,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,075.78 : 98,085.84 = 39,242.78 : x
  2. Step 2: Convert to fraction form
    71,075.78/98,085.84 = 39,242.78/x
  3. Step 3: Cross multiply
    71,075.78x = 98,085.84 × 39,242.78
  4. Step 4: Simplify right side
    71,075.78x = 3,849,161,040.24
  5. Step 5: Solve for x
    x = 3,849,161,040.24/71,075.78
  6. Step 6: Final answer
    x = 54,155.73

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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.