Home / 143,619,409.80-215,429,114.70-85,506,336.45

Finding the Fourth Proportional to 143,619,409.80, 215,429,114.70 and 85,506,336.45

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Solution

The fourth proportional to 143,619,409.80, 215,429,114.70 and 85,506,336.45 is: 128,259,504.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,619,409.80 : 215,429,114.70 = 85,506,336.45 : x
  2. Step 2: Convert to fraction form
    143,619,409.80/215,429,114.70 = 85,506,336.45/x
  3. Step 3: Cross multiply
    143,619,409.80x = 215,429,114.70 × 85,506,336.45
  4. Step 4: Simplify right side
    143,619,409.80x = 18,420,554,362,663,840
  5. Step 5: Solve for x
    x = 18,420,554,362,663,840/143,619,409.80
  6. Step 6: Final answer
    x = 128,259,504.68

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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.