Home / 103,629.40-155,444.10-78,746.20

Finding the Fourth Proportional to 103,629.40, 155,444.10 and 78,746.20

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Solution

The fourth proportional to 103,629.40, 155,444.10 and 78,746.20 is: 118,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629.40 : 155,444.10 = 78,746.20 : x
  2. Step 2: Convert to fraction form
    103,629.40/155,444.10 = 78,746.20/x
  3. Step 3: Cross multiply
    103,629.40x = 155,444.10 × 78,746.20
  4. Step 4: Simplify right side
    103,629.40x = 12,240,632,187.42
  5. Step 5: Solve for x
    x = 12,240,632,187.42/103,629.40
  6. Step 6: Final answer
    x = 118,119.30

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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.