Home / 80,785,791.20-121,178,686.80-46,689,586.40

Finding the Fourth Proportional to 80,785,791.20, 121,178,686.80 and 46,689,586.40

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Solution

The fourth proportional to 80,785,791.20, 121,178,686.80 and 46,689,586.40 is: 70,034,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,785,791.20 : 121,178,686.80 = 46,689,586.40 : x
  2. Step 2: Convert to fraction form
    80,785,791.20/121,178,686.80 = 46,689,586.40/x
  3. Step 3: Cross multiply
    80,785,791.20x = 121,178,686.80 × 46,689,586.40
  4. Step 4: Simplify right side
    80,785,791.20x = 5,657,782,767,187,139
  5. Step 5: Solve for x
    x = 5,657,782,767,187,139/80,785,791.20
  6. Step 6: Final answer
    x = 70,034,379.60

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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.