Home / 215,681.85-297,641.25-120,186.45

Finding the Fourth Proportional to 215,681.85, 297,641.25 and 120,186.45

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Solution

The fourth proportional to 215,681.85, 297,641.25 and 120,186.45 is: 165,857.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,681.85 : 297,641.25 = 120,186.45 : x
  2. Step 2: Convert to fraction form
    215,681.85/297,641.25 = 120,186.45/x
  3. Step 3: Cross multiply
    215,681.85x = 297,641.25 × 120,186.45
  4. Step 4: Simplify right side
    215,681.85x = 35,772,445,211.06
  5. Step 5: Solve for x
    x = 35,772,445,211.06/215,681.85
  6. Step 6: Final answer
    x = 165,857.47

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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.