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Finding the Fourth Proportional to 90,387.60, 124,579.12 and 60,118.80

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Solution

The fourth proportional to 90,387.60, 124,579.12 and 60,118.80 is: 82,860.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,387.60 : 124,579.12 = 60,118.80 : x
  2. Step 2: Convert to fraction form
    90,387.60/124,579.12 = 60,118.80/x
  3. Step 3: Cross multiply
    90,387.60x = 124,579.12 × 60,118.80
  4. Step 4: Simplify right side
    90,387.60x = 7,489,547,199.46
  5. Step 5: Solve for x
    x = 7,489,547,199.46/90,387.60
  6. Step 6: Final answer
    x = 82,860.34

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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.