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Finding the Fourth Proportional to 210,322.20, 315,569.70 and 77,266.20

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Solution

The fourth proportional to 210,322.20, 315,569.70 and 77,266.20 is: 115,931.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,322.20 : 315,569.70 = 77,266.20 : x
  2. Step 2: Convert to fraction form
    210,322.20/315,569.70 = 77,266.20/x
  3. Step 3: Cross multiply
    210,322.20x = 315,569.70 × 77,266.20
  4. Step 4: Simplify right side
    210,322.20x = 24,382,871,554.14
  5. Step 5: Solve for x
    x = 24,382,871,554.14/210,322.20
  6. Step 6: Final answer
    x = 115,931.04

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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.