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Finding the Fourth Proportional to 98,705.52, 136,210 and 56,255.86

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Solution

The fourth proportional to 98,705.52, 136,210 and 56,255.86 is: 77,631.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,705.52 : 136,210 = 56,255.86 : x
  2. Step 2: Convert to fraction form
    98,705.52/136,210 = 56,255.86/x
  3. Step 3: Cross multiply
    98,705.52x = 136,210 × 56,255.86
  4. Step 4: Simplify right side
    98,705.52x = 7,662,610,690.60
  5. Step 5: Solve for x
    x = 7,662,610,690.60/98,705.52
  6. Step 6: Final answer
    x = 77,631.02

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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.