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Finding the Fourth Proportional to 153,405.18, 211,648.41 and 89,697.87

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Solution

The fourth proportional to 153,405.18, 211,648.41 and 89,697.87 is: 123,753.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,405.18 : 211,648.41 = 89,697.87 : x
  2. Step 2: Convert to fraction form
    153,405.18/211,648.41 = 89,697.87/x
  3. Step 3: Cross multiply
    153,405.18x = 211,648.41 × 89,697.87
  4. Step 4: Simplify right side
    153,405.18x = 18,984,411,565.89
  5. Step 5: Solve for x
    x = 18,984,411,565.89/153,405.18
  6. Step 6: Final answer
    x = 123,753.39

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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.