Home / 121,289.40-181,869.30-42,406.20

Finding the Fourth Proportional to 121,289.40, 181,869.30 and 42,406.20

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Solution

The fourth proportional to 121,289.40, 181,869.30 and 42,406.20 is: 63,586.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,289.40 : 181,869.30 = 42,406.20 : x
  2. Step 2: Convert to fraction form
    121,289.40/181,869.30 = 42,406.20/x
  3. Step 3: Cross multiply
    121,289.40x = 181,869.30 × 42,406.20
  4. Step 4: Simplify right side
    121,289.40x = 7,712,385,909.66
  5. Step 5: Solve for x
    x = 7,712,385,909.66/121,289.40
  6. Step 6: Final answer
    x = 63,586.64

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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.