Home / 90,903.05-125,439.80-56,909.98

Finding the Fourth Proportional to 90,903.05, 125,439.80 and 56,909.98

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Solution

The fourth proportional to 90,903.05, 125,439.80 and 56,909.98 is: 78,531.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,903.05 : 125,439.80 = 56,909.98 : x
  2. Step 2: Convert to fraction form
    90,903.05/125,439.80 = 56,909.98/x
  3. Step 3: Cross multiply
    90,903.05x = 125,439.80 × 56,909.98
  4. Step 4: Simplify right side
    90,903.05x = 7,138,776,509.20
  5. Step 5: Solve for x
    x = 7,138,776,509.20/90,903.05
  6. Step 6: Final answer
    x = 78,531.76

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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.