Home / 155,878,989.86-215,104,253.51-85,314,455.77

Finding the Fourth Proportional to 155,878,989.86, 215,104,253.51 and 85,314,455.77

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Solution

The fourth proportional to 155,878,989.86, 215,104,253.51 and 85,314,455.77 is: 117,729,158.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,878,989.86 : 215,104,253.51 = 85,314,455.77 : x
  2. Step 2: Convert to fraction form
    155,878,989.86/215,104,253.51 = 85,314,455.77/x
  3. Step 3: Cross multiply
    155,878,989.86x = 215,104,253.51 × 85,314,455.77
  4. Step 4: Simplify right side
    155,878,989.86x = 18,351,502,321,693,288
  5. Step 5: Solve for x
    x = 18,351,502,321,693,288/155,878,989.86
  6. Step 6: Final answer
    x = 117,729,158.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.