Home / 126,123.21-173,869.20-99,219.02

Finding the Fourth Proportional to 126,123.21, 173,869.20 and 99,219.02

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Solution

The fourth proportional to 126,123.21, 173,869.20 and 99,219.02 is: 136,779.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,123.21 : 173,869.20 = 99,219.02 : x
  2. Step 2: Convert to fraction form
    126,123.21/173,869.20 = 99,219.02/x
  3. Step 3: Cross multiply
    126,123.21x = 173,869.20 × 99,219.02
  4. Step 4: Simplify right side
    126,123.21x = 17,251,130,762.84
  5. Step 5: Solve for x
    x = 17,251,130,762.84/126,123.21
  6. Step 6: Final answer
    x = 136,779.98

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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.