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Finding the Fourth Proportional to 61,429.60, 91,925.70 and 42,621.40

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Solution

The fourth proportional to 61,429.60, 91,925.70 and 42,621.40 is: 63,780.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,429.60 : 91,925.70 = 42,621.40 : x
  2. Step 2: Convert to fraction form
    61,429.60/91,925.70 = 42,621.40/x
  3. Step 3: Cross multiply
    61,429.60x = 91,925.70 × 42,621.40
  4. Step 4: Simplify right side
    61,429.60x = 3,918,002,029.98
  5. Step 5: Solve for x
    x = 3,918,002,029.98/61,429.60
  6. Step 6: Final answer
    x = 63,780.36

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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.