Home / 147,721.40-221,430.90-72,726.20

Finding the Fourth Proportional to 147,721.40, 221,430.90 and 72,726.20

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Solution

The fourth proportional to 147,721.40, 221,430.90 and 72,726.20 is: 109,014.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,721.40 : 221,430.90 = 72,726.20 : x
  2. Step 2: Convert to fraction form
    147,721.40/221,430.90 = 72,726.20/x
  3. Step 3: Cross multiply
    147,721.40x = 221,430.90 × 72,726.20
  4. Step 4: Simplify right side
    147,721.40x = 16,103,827,919.58
  5. Step 5: Solve for x
    x = 16,103,827,919.58/147,721.40
  6. Step 6: Final answer
    x = 109,014.86

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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.