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Finding the Fourth Proportional to 210,883.16, 291,018.78 and 115,389.87

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Solution

The fourth proportional to 210,883.16, 291,018.78 and 115,389.87 is: 159,238.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,883.16 : 291,018.78 = 115,389.87 : x
  2. Step 2: Convert to fraction form
    210,883.16/291,018.78 = 115,389.87/x
  3. Step 3: Cross multiply
    210,883.16x = 291,018.78 × 115,389.87
  4. Step 4: Simplify right side
    210,883.16x = 33,580,619,191.76
  5. Step 5: Solve for x
    x = 33,580,619,191.76/210,883.16
  6. Step 6: Final answer
    x = 159,238.03

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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.