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Finding the Fourth Proportional to 210,320.70, 315,567.45 and 77,264.70

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Solution

The fourth proportional to 210,320.70, 315,567.45 and 77,264.70 is: 115,928.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,320.70 : 315,567.45 = 77,264.70 : x
  2. Step 2: Convert to fraction form
    210,320.70/315,567.45 = 77,264.70/x
  3. Step 3: Cross multiply
    210,320.70x = 315,567.45 × 77,264.70
  4. Step 4: Simplify right side
    210,320.70x = 24,382,224,354.02
  5. Step 5: Solve for x
    x = 24,382,224,354.02/210,320.70
  6. Step 6: Final answer
    x = 115,928.79

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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.