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Finding the Fourth Proportional to 164,003.80, 245,852.10 and 128,445.40

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Solution

The fourth proportional to 164,003.80, 245,852.10 and 128,445.40 is: 192,547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,003.80 : 245,852.10 = 128,445.40 : x
  2. Step 2: Convert to fraction form
    164,003.80/245,852.10 = 128,445.40/x
  3. Step 3: Cross multiply
    164,003.80x = 245,852.10 × 128,445.40
  4. Step 4: Simplify right side
    164,003.80x = 31,578,571,325.34
  5. Step 5: Solve for x
    x = 31,578,571,325.34/164,003.80
  6. Step 6: Final answer
    x = 192,547.80

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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.