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Finding the Fourth Proportional to 208,498.64, 312,748 and 83,810.48

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Solution

The fourth proportional to 208,498.64, 312,748 and 83,810.48 is: 125,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,498.64 : 312,748 = 83,810.48 : x
  2. Step 2: Convert to fraction form
    208,498.64/312,748 = 83,810.48/x
  3. Step 3: Cross multiply
    208,498.64x = 312,748 × 83,810.48
  4. Step 4: Simplify right side
    208,498.64x = 26,211,559,999.04
  5. Step 5: Solve for x
    x = 26,211,559,999.04/208,498.64
  6. Step 6: Final answer
    x = 125,715.74

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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.