Home / 85,433,136.80-128,118,212.40-42,288,000.80

Finding the Fourth Proportional to 85,433,136.80, 128,118,212.40 and 42,288,000.80

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Solution

The fourth proportional to 85,433,136.80, 128,118,212.40 and 42,288,000.80 is: 63,416,412.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,433,136.80 : 128,118,212.40 = 42,288,000.80 : x
  2. Step 2: Convert to fraction form
    85,433,136.80/128,118,212.40 = 42,288,000.80/x
  3. Step 3: Cross multiply
    85,433,136.80x = 128,118,212.40 × 42,288,000.80
  4. Step 4: Simplify right side
    85,433,136.80x = 5,417,863,068,465,770
  5. Step 5: Solve for x
    x = 5,417,863,068,465,770/85,433,136.80
  6. Step 6: Final answer
    x = 63,416,412.78

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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.