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Finding the Fourth Proportional to 74,995.20, 112,492.80 and 57,499.20

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Solution

The fourth proportional to 74,995.20, 112,492.80 and 57,499.20 is: 86,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,995.20 : 112,492.80 = 57,499.20 : x
  2. Step 2: Convert to fraction form
    74,995.20/112,492.80 = 57,499.20/x
  3. Step 3: Cross multiply
    74,995.20x = 112,492.80 × 57,499.20
  4. Step 4: Simplify right side
    74,995.20x = 6,468,246,005.76
  5. Step 5: Solve for x
    x = 6,468,246,005.76/74,995.20
  6. Step 6: Final answer
    x = 86,248.80

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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.