Home / 85,499,406.20-128,333,090.10-42,417,255.80

Finding the Fourth Proportional to 85,499,406.20, 128,333,090.10 and 42,417,255.80

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Solution

The fourth proportional to 85,499,406.20, 128,333,090.10 and 42,417,255.80 is: 63,667,547.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,499,406.20 : 128,333,090.10 = 42,417,255.80 : x
  2. Step 2: Convert to fraction form
    85,499,406.20/128,333,090.10 = 42,417,255.80/x
  3. Step 3: Cross multiply
    85,499,406.20x = 128,333,090.10 × 42,417,255.80
  4. Step 4: Simplify right side
    85,499,406.20x = 5,443,537,510,376,147
  5. Step 5: Solve for x
    x = 5,443,537,510,376,147/85,499,406.20
  6. Step 6: Final answer
    x = 63,667,547.56

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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.