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Finding the Fourth Proportional to 128,157.06, 192,126.12 and 90,598.98

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Solution

The fourth proportional to 128,157.06, 192,126.12 and 90,598.98 is: 135,821.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,157.06 : 192,126.12 = 90,598.98 : x
  2. Step 2: Convert to fraction form
    128,157.06/192,126.12 = 90,598.98/x
  3. Step 3: Cross multiply
    128,157.06x = 192,126.12 × 90,598.98
  4. Step 4: Simplify right side
    128,157.06x = 17,406,430,503.36
  5. Step 5: Solve for x
    x = 17,406,430,503.36/128,157.06
  6. Step 6: Final answer
    x = 135,821.08

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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.