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Finding the Fourth Proportional to 89,045.20, 124,430 and 89,045.20

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Solution

The fourth proportional to 89,045.20, 124,430 and 89,045.20 is: 124,430

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,045.20 : 124,430 = 89,045.20 : x
  2. Step 2: Convert to fraction form
    89,045.20/124,430 = 89,045.20/x
  3. Step 3: Cross multiply
    89,045.20x = 124,430 × 89,045.20
  4. Step 4: Simplify right side
    89,045.20x = 11,079,894,236
  5. Step 5: Solve for x
    x = 11,079,894,236/89,045.20
  6. Step 6: Final answer
    x = 124,430

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.