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Finding the Fourth Proportional to 78,885.58, 108,862.09 and 43,075.63

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Solution

The fourth proportional to 78,885.58, 108,862.09 and 43,075.63 is: 59,444.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,885.58 : 108,862.09 = 43,075.63 : x
  2. Step 2: Convert to fraction form
    78,885.58/108,862.09 = 43,075.63/x
  3. Step 3: Cross multiply
    78,885.58x = 108,862.09 × 43,075.63
  4. Step 4: Simplify right side
    78,885.58x = 4,689,302,768.21
  5. Step 5: Solve for x
    x = 4,689,302,768.21/78,885.58
  6. Step 6: Final answer
    x = 59,444.36

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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.