Home / 86,503.80-129,852.90-66,869.40

Finding the Fourth Proportional to 86,503.80, 129,852.90 and 66,869.40

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Solution

The fourth proportional to 86,503.80, 129,852.90 and 66,869.40 is: 100,379.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,503.80 : 129,852.90 = 66,869.40 : x
  2. Step 2: Convert to fraction form
    86,503.80/129,852.90 = 66,869.40/x
  3. Step 3: Cross multiply
    86,503.80x = 129,852.90 × 66,869.40
  4. Step 4: Simplify right side
    86,503.80x = 8,683,185,511.26
  5. Step 5: Solve for x
    x = 8,683,185,511.26/86,503.80
  6. Step 6: Final answer
    x = 100,379.24

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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.