Home / 66,515,011.60-99,697,867.80-28,170,000.40

Finding the Fourth Proportional to 66,515,011.60, 99,697,867.80 and 28,170,000.40

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Solution

The fourth proportional to 66,515,011.60, 99,697,867.80 and 28,170,000.40 is: 42,223,385.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,515,011.60 : 99,697,867.80 = 28,170,000.40 : x
  2. Step 2: Convert to fraction form
    66,515,011.60/99,697,867.80 = 28,170,000.40/x
  3. Step 3: Cross multiply
    66,515,011.60x = 99,697,867.80 × 28,170,000.40
  4. Step 4: Simplify right side
    66,515,011.60x = 2,808,488,975,805,147
  5. Step 5: Solve for x
    x = 2,808,488,975,805,147/66,515,011.60
  6. Step 6: Final answer
    x = 42,223,385.49

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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.