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Finding the Fourth Proportional to 448,017.87, 671,920.65 and 128,159.88

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Solution

The fourth proportional to 448,017.87, 671,920.65 and 128,159.88 is: 192,209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,017.87 : 671,920.65 = 128,159.88 : x
  2. Step 2: Convert to fraction form
    448,017.87/671,920.65 = 128,159.88/x
  3. Step 3: Cross multiply
    448,017.87x = 671,920.65 × 128,159.88
  4. Step 4: Simplify right side
    448,017.87x = 86,113,269,873.52
  5. Step 5: Solve for x
    x = 86,113,269,873.52/448,017.87
  6. Step 6: Final answer
    x = 192,209.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.