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Finding the Fourth Proportional to 210,980.84, 291,153.96 and 115,493.64

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Solution

The fourth proportional to 210,980.84, 291,153.96 and 115,493.64 is: 159,381.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,980.84 : 291,153.96 = 115,493.64 : x
  2. Step 2: Convert to fraction form
    210,980.84/291,153.96 = 115,493.64/x
  3. Step 3: Cross multiply
    210,980.84x = 291,153.96 × 115,493.64
  4. Step 4: Simplify right side
    210,980.84x = 33,626,430,640.81
  5. Step 5: Solve for x
    x = 33,626,430,640.81/210,980.84
  6. Step 6: Final answer
    x = 159,381.44

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1.5x scale

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.