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Finding the Fourth Proportional to 101,394.40, 139,934.36 and 56,075.80

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Solution

The fourth proportional to 101,394.40, 139,934.36 and 56,075.80 is: 77,390.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,394.40 : 139,934.36 = 56,075.80 : x
  2. Step 2: Convert to fraction form
    101,394.40/139,934.36 = 56,075.80/x
  3. Step 3: Cross multiply
    101,394.40x = 139,934.36 × 56,075.80
  4. Step 4: Simplify right side
    101,394.40x = 7,846,931,184.49
  5. Step 5: Solve for x
    x = 7,846,931,184.49/101,394.40
  6. Step 6: Final answer
    x = 77,390.18

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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.