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Finding the Fourth Proportional to 61,141.70, 91,712.55 and 42,114.80

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Solution

The fourth proportional to 61,141.70, 91,712.55 and 42,114.80 is: 63,172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,141.70 : 91,712.55 = 42,114.80 : x
  2. Step 2: Convert to fraction form
    61,141.70/91,712.55 = 42,114.80/x
  3. Step 3: Cross multiply
    61,141.70x = 91,712.55 × 42,114.80
  4. Step 4: Simplify right side
    61,141.70x = 3,862,455,700.74
  5. Step 5: Solve for x
    x = 3,862,455,700.74/61,141.70
  6. Step 6: Final answer
    x = 63,172.20

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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.