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Finding the Fourth Proportional to 169,920.90, 254,881.35 and 128,448.90

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Solution

The fourth proportional to 169,920.90, 254,881.35 and 128,448.90 is: 192,673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,920.90 : 254,881.35 = 128,448.90 : x
  2. Step 2: Convert to fraction form
    169,920.90/254,881.35 = 128,448.90/x
  3. Step 3: Cross multiply
    169,920.90x = 254,881.35 × 128,448.90
  4. Step 4: Simplify right side
    169,920.90x = 32,739,229,038.02
  5. Step 5: Solve for x
    x = 32,739,229,038.02/169,920.90
  6. Step 6: Final answer
    x = 192,673.35

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1.5x scale

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.