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Finding the Fourth Proportional to 98,800.12, 136,344 and 53,478.08

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Solution

The fourth proportional to 98,800.12, 136,344 and 53,478.08 is: 73,799.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,800.12 : 136,344 = 53,478.08 : x
  2. Step 2: Convert to fraction form
    98,800.12/136,344 = 53,478.08/x
  3. Step 3: Cross multiply
    98,800.12x = 136,344 × 53,478.08
  4. Step 4: Simplify right side
    98,800.12x = 7,291,415,339.52
  5. Step 5: Solve for x
    x = 7,291,415,339.52/98,800.12
  6. Step 6: Final answer
    x = 73,799.66

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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.