Home / 138,885.96-191,666.55-78,459.15

Finding the Fourth Proportional to 138,885.96, 191,666.55 and 78,459.15

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Solution

The fourth proportional to 138,885.96, 191,666.55 and 78,459.15 is: 108,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.96 : 191,666.55 = 78,459.15 : x
  2. Step 2: Convert to fraction form
    138,885.96/191,666.55 = 78,459.15/x
  3. Step 3: Cross multiply
    138,885.96x = 191,666.55 × 78,459.15
  4. Step 4: Simplify right side
    138,885.96x = 15,037,994,596.43
  5. Step 5: Solve for x
    x = 15,037,994,596.43/138,885.96
  6. Step 6: Final answer
    x = 108,275.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.