Home / 85,826,620.80-128,739,931.20-76,473,259.20

Finding the Fourth Proportional to 85,826,620.80, 128,739,931.20 and 76,473,259.20

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Solution

The fourth proportional to 85,826,620.80, 128,739,931.20 and 76,473,259.20 is: 114,709,888.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826,620.80 : 128,739,931.20 = 76,473,259.20 : x
  2. Step 2: Convert to fraction form
    85,826,620.80/128,739,931.20 = 76,473,259.20/x
  3. Step 3: Cross multiply
    85,826,620.80x = 128,739,931.20 × 76,473,259.20
  4. Step 4: Simplify right side
    85,826,620.80x = 9,845,162,128,047,768
  5. Step 5: Solve for x
    x = 9,845,162,128,047,768/85,826,620.80
  6. Step 6: Final answer
    x = 114,709,888.80

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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.