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Finding the Fourth Proportional to 99,142.79, 136,817.15 and 53,820.74

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Solution

The fourth proportional to 99,142.79, 136,817.15 and 53,820.74 is: 74,272.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,142.79 : 136,817.15 = 53,820.74 : x
  2. Step 2: Convert to fraction form
    99,142.79/136,817.15 = 53,820.74/x
  3. Step 3: Cross multiply
    99,142.79x = 136,817.15 × 53,820.74
  4. Step 4: Simplify right side
    99,142.79x = 7,363,600,330.63
  5. Step 5: Solve for x
    x = 7,363,600,330.63/99,142.79
  6. Step 6: Final answer
    x = 74,272.68

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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.