Home / 109,909.12-151,660.80-61,509.76

Finding the Fourth Proportional to 109,909.12, 151,660.80 and 61,509.76

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Solution

The fourth proportional to 109,909.12, 151,660.80 and 61,509.76 is: 84,875.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,909.12 : 151,660.80 = 61,509.76 : x
  2. Step 2: Convert to fraction form
    109,909.12/151,660.80 = 61,509.76/x
  3. Step 3: Cross multiply
    109,909.12x = 151,660.80 × 61,509.76
  4. Step 4: Simplify right side
    109,909.12x = 9,328,619,409.41
  5. Step 5: Solve for x
    x = 9,328,619,409.41/109,909.12
  6. Step 6: Final answer
    x = 84,875.75

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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.