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Finding the Fourth Proportional to 85,581.90, 128,265.93 and 59,075.46

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Solution

The fourth proportional to 85,581.90, 128,265.93 and 59,075.46 is: 88,539.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,581.90 : 128,265.93 = 59,075.46 : x
  2. Step 2: Convert to fraction form
    85,581.90/128,265.93 = 59,075.46/x
  3. Step 3: Cross multiply
    85,581.90x = 128,265.93 × 59,075.46
  4. Step 4: Simplify right side
    85,581.90x = 7,577,368,817.08
  5. Step 5: Solve for x
    x = 7,577,368,817.08/85,581.90
  6. Step 6: Final answer
    x = 88,539.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.