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Finding the Fourth Proportional to 153,726.67, 212,143.10 and 85,748.05

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Solution

The fourth proportional to 153,726.67, 212,143.10 and 85,748.05 is: 118,332.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,726.67 : 212,143.10 = 85,748.05 : x
  2. Step 2: Convert to fraction form
    153,726.67/212,143.10 = 85,748.05/x
  3. Step 3: Cross multiply
    153,726.67x = 212,143.10 × 85,748.05
  4. Step 4: Simplify right side
    153,726.67x = 18,190,857,145.96
  5. Step 5: Solve for x
    x = 18,190,857,145.96/153,726.67
  6. Step 6: Final answer
    x = 118,332.47

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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.