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Finding the Fourth Proportional to 153,368.91, 211,580.91 and 89,678.61

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Solution

The fourth proportional to 153,368.91, 211,580.91 and 89,678.61 is: 123,716.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,368.91 : 211,580.91 = 89,678.61 : x
  2. Step 2: Convert to fraction form
    153,368.91/211,580.91 = 89,678.61/x
  3. Step 3: Cross multiply
    153,368.91x = 211,580.91 × 89,678.61
  4. Step 4: Simplify right side
    153,368.91x = 18,974,281,911.34
  5. Step 5: Solve for x
    x = 18,974,281,911.34/153,368.91
  6. Step 6: Final answer
    x = 123,716.61

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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.