Home / 103,689.48-155,528.75-51,081.20

Finding the Fourth Proportional to 103,689.48, 155,528.75 and 51,081.20

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Solution

The fourth proportional to 103,689.48, 155,528.75 and 51,081.20 is: 76,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.48 : 155,528.75 = 51,081.20 : x
  2. Step 2: Convert to fraction form
    103,689.48/155,528.75 = 51,081.20/x
  3. Step 3: Cross multiply
    103,689.48x = 155,528.75 × 51,081.20
  4. Step 4: Simplify right side
    103,689.48x = 7,944,594,151.45
  5. Step 5: Solve for x
    x = 7,944,594,151.45/103,689.48
  6. Step 6: Final answer
    x = 76,619.10

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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.