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Finding the Fourth Proportional to 153,572.52, 211,902.03 and 85,587.78

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Solution

The fourth proportional to 153,572.52, 211,902.03 and 85,587.78 is: 118,095.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,572.52 : 211,902.03 = 85,587.78 : x
  2. Step 2: Convert to fraction form
    153,572.52/211,902.03 = 85,587.78/x
  3. Step 3: Cross multiply
    153,572.52x = 211,902.03 × 85,587.78
  4. Step 4: Simplify right side
    153,572.52x = 18,136,224,325.19
  5. Step 5: Solve for x
    x = 18,136,224,325.19/153,572.52
  6. Step 6: Final answer
    x = 118,095.51

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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.