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Finding the Fourth Proportional to 55,428, 76,492.32 and 30,279.12

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Solution

The fourth proportional to 55,428, 76,492.32 and 30,279.12 is: 41,786.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,428 : 76,492.32 = 30,279.12 : x
  2. Step 2: Convert to fraction form
    55,428/76,492.32 = 30,279.12/x
  3. Step 3: Cross multiply
    55,428x = 76,492.32 × 30,279.12
  4. Step 4: Simplify right side
    55,428x = 2,316,120,136.36
  5. Step 5: Solve for x
    x = 2,316,120,136.36/55,428
  6. Step 6: Final answer
    x = 41,786.10

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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.