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Finding the Fourth Proportional to 98,978.25, 136,590.36 and 53,656.32

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Solution

The fourth proportional to 98,978.25, 136,590.36 and 53,656.32 is: 74,045.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,978.25 : 136,590.36 = 53,656.32 : x
  2. Step 2: Convert to fraction form
    98,978.25/136,590.36 = 53,656.32/x
  3. Step 3: Cross multiply
    98,978.25x = 136,590.36 × 53,656.32
  4. Step 4: Simplify right side
    98,978.25x = 7,328,936,065.08
  5. Step 5: Solve for x
    x = 7,328,936,065.08/98,978.25
  6. Step 6: Final answer
    x = 74,045.92

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1.5x scale

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.