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Finding the Fourth Proportional to 118,412.78, 163,404.74 and 64,699.64

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Solution

The fourth proportional to 118,412.78, 163,404.74 and 64,699.64 is: 89,282.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,412.78 : 163,404.74 = 64,699.64 : x
  2. Step 2: Convert to fraction form
    118,412.78/163,404.74 = 64,699.64/x
  3. Step 3: Cross multiply
    118,412.78x = 163,404.74 × 64,699.64
  4. Step 4: Simplify right side
    118,412.78x = 10,572,227,852.29
  5. Step 5: Solve for x
    x = 10,572,227,852.29/118,412.78
  6. Step 6: Final answer
    x = 89,282.83

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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.