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Finding the Fourth Proportional to 154,384.88, 212,983.50 and 90,693.94

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Solution

The fourth proportional to 154,384.88, 212,983.50 and 90,693.94 is: 125,117.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,384.88 : 212,983.50 = 90,693.94 : x
  2. Step 2: Convert to fraction form
    154,384.88/212,983.50 = 90,693.94/x
  3. Step 3: Cross multiply
    154,384.88x = 212,983.50 × 90,693.94
  4. Step 4: Simplify right side
    154,384.88x = 19,316,312,769.99
  5. Step 5: Solve for x
    x = 19,316,312,769.99/154,384.88
  6. Step 6: Final answer
    x = 125,117.91

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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.