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Finding the Fourth Proportional to 98,070.21, 135,339.30 and 53,358.21

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Solution

The fourth proportional to 98,070.21, 135,339.30 and 53,358.21 is: 73,635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,070.21 : 135,339.30 = 53,358.21 : x
  2. Step 2: Convert to fraction form
    98,070.21/135,339.30 = 53,358.21/x
  3. Step 3: Cross multiply
    98,070.21x = 135,339.30 × 53,358.21
  4. Step 4: Simplify right side
    98,070.21x = 7,221,462,790.65
  5. Step 5: Solve for x
    x = 7,221,462,790.65/98,070.21
  6. Step 6: Final answer
    x = 73,635.64

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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.