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Finding the Fourth Proportional to 112,900.40, 169,417.80 and 42,786.80

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Solution

The fourth proportional to 112,900.40, 169,417.80 and 42,786.80 is: 64,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,900.40 : 169,417.80 = 42,786.80 : x
  2. Step 2: Convert to fraction form
    112,900.40/169,417.80 = 42,786.80/x
  3. Step 3: Cross multiply
    112,900.40x = 169,417.80 × 42,786.80
  4. Step 4: Simplify right side
    112,900.40x = 7,248,845,525.04
  5. Step 5: Solve for x
    x = 7,248,845,525.04/112,900.40
  6. Step 6: Final answer
    x = 64,205.67

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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.