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Finding the Fourth Proportional to 86,045.82, 128,900.70 and 56,373.54

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Solution

The fourth proportional to 86,045.82, 128,900.70 and 56,373.54 is: 84,450.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,045.82 : 128,900.70 = 56,373.54 : x
  2. Step 2: Convert to fraction form
    86,045.82/128,900.70 = 56,373.54/x
  3. Step 3: Cross multiply
    86,045.82x = 128,900.70 × 56,373.54
  4. Step 4: Simplify right side
    86,045.82x = 7,266,588,767.48
  5. Step 5: Solve for x
    x = 7,266,588,767.48/86,045.82
  6. Step 6: Final answer
    x = 84,450.22

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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.