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Finding the Fourth Proportional to 212,312.84, 318,461 and 79,192.84

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Solution

The fourth proportional to 212,312.84, 318,461 and 79,192.84 is: 118,786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,312.84 : 318,461 = 79,192.84 : x
  2. Step 2: Convert to fraction form
    212,312.84/318,461 = 79,192.84/x
  3. Step 3: Cross multiply
    212,312.84x = 318,461 × 79,192.84
  4. Step 4: Simplify right side
    212,312.84x = 25,219,831,019.24
  5. Step 5: Solve for x
    x = 25,219,831,019.24/212,312.84
  6. Step 6: Final answer
    x = 118,786.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.