Home / 86,431.15-129,543.20-56,459.63

Finding the Fourth Proportional to 86,431.15, 129,543.20 and 56,459.63

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Solution

The fourth proportional to 86,431.15, 129,543.20 and 56,459.63 is: 84,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,431.15 : 129,543.20 = 56,459.63 : x
  2. Step 2: Convert to fraction form
    86,431.15/129,543.20 = 56,459.63/x
  3. Step 3: Cross multiply
    86,431.15x = 129,543.20 × 56,459.63
  4. Step 4: Simplify right side
    86,431.15x = 7,313,961,394.30
  5. Step 5: Solve for x
    x = 7,313,961,394.30/86,431.15
  6. Step 6: Final answer
    x = 84,621.82

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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.