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Finding the Fourth Proportional to 153,521.21, 211,874.87 and 85,549.25

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Solution

The fourth proportional to 153,521.21, 211,874.87 and 85,549.25 is: 118,066.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,521.21 : 211,874.87 = 85,549.25 : x
  2. Step 2: Convert to fraction form
    153,521.21/211,874.87 = 85,549.25/x
  3. Step 3: Cross multiply
    153,521.21x = 211,874.87 × 85,549.25
  4. Step 4: Simplify right side
    153,521.21x = 18,125,736,965.91
  5. Step 5: Solve for x
    x = 18,125,736,965.91/153,521.21
  6. Step 6: Final answer
    x = 118,066.66

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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.