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Finding the Fourth Proportional to 85,459.95, 128,190.78 and 56,064.24

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Solution

The fourth proportional to 85,459.95, 128,190.78 and 56,064.24 is: 84,096.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,459.95 : 128,190.78 = 56,064.24 : x
  2. Step 2: Convert to fraction form
    85,459.95/128,190.78 = 56,064.24/x
  3. Step 3: Cross multiply
    85,459.95x = 128,190.78 × 56,064.24
  4. Step 4: Simplify right side
    85,459.95x = 7,186,918,655.71
  5. Step 5: Solve for x
    x = 7,186,918,655.71/85,459.95
  6. Step 6: Final answer
    x = 84,096.92

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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.