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Finding the Fourth Proportional to 56,211.72, 84,307.86 and 19,275.72

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Solution

The fourth proportional to 56,211.72, 84,307.86 and 19,275.72 is: 28,910.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,211.72 : 84,307.86 = 19,275.72 : x
  2. Step 2: Convert to fraction form
    56,211.72/84,307.86 = 19,275.72/x
  3. Step 3: Cross multiply
    56,211.72x = 84,307.86 × 19,275.72
  4. Step 4: Simplify right side
    56,211.72x = 1,625,094,703.16
  5. Step 5: Solve for x
    x = 1,625,094,703.16/56,211.72
  6. Step 6: Final answer
    x = 28,910.25

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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.