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Finding the Fourth Proportional to 92,869.20, 128,111.40 and 58,820.40

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Solution

The fourth proportional to 92,869.20, 128,111.40 and 58,820.40 is: 81,141.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,869.20 : 128,111.40 = 58,820.40 : x
  2. Step 2: Convert to fraction form
    92,869.20/128,111.40 = 58,820.40/x
  3. Step 3: Cross multiply
    92,869.20x = 128,111.40 × 58,820.40
  4. Step 4: Simplify right side
    92,869.20x = 7,535,563,792.56
  5. Step 5: Solve for x
    x = 7,535,563,792.56/92,869.20
  6. Step 6: Final answer
    x = 81,141.69

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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.