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Finding the Fourth Proportional to 153,492.30, 211,711.05 and 89,842.77

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Solution

The fourth proportional to 153,492.30, 211,711.05 and 89,842.77 is: 123,919.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,492.30 : 211,711.05 = 89,842.77 : x
  2. Step 2: Convert to fraction form
    153,492.30/211,711.05 = 89,842.77/x
  3. Step 3: Cross multiply
    153,492.30x = 211,711.05 × 89,842.77
  4. Step 4: Simplify right side
    153,492.30x = 19,020,707,171.61
  5. Step 5: Solve for x
    x = 19,020,707,171.61/153,492.30
  6. Step 6: Final answer
    x = 123,919.62

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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.