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Finding the Fourth Proportional to 66,335.80, 99,503.70 and 51,590.20

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Solution

The fourth proportional to 66,335.80, 99,503.70 and 51,590.20 is: 77,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,335.80 : 99,503.70 = 51,590.20 : x
  2. Step 2: Convert to fraction form
    66,335.80/99,503.70 = 51,590.20/x
  3. Step 3: Cross multiply
    66,335.80x = 99,503.70 × 51,590.20
  4. Step 4: Simplify right side
    66,335.80x = 5,133,415,783.74
  5. Step 5: Solve for x
    x = 5,133,415,783.74/66,335.80
  6. Step 6: Final answer
    x = 77,385.30

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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.