Home / 155,878,990.86-215,104,254.89-85,314,456.77

Finding the Fourth Proportional to 155,878,990.86, 215,104,254.89 and 85,314,456.77

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Solution

The fourth proportional to 155,878,990.86, 215,104,254.89 and 85,314,456.77 is: 117,729,160.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,878,990.86 : 215,104,254.89 = 85,314,456.77 : x
  2. Step 2: Convert to fraction form
    155,878,990.86/215,104,254.89 = 85,314,456.77/x
  3. Step 3: Cross multiply
    155,878,990.86x = 215,104,254.89 × 85,314,456.77
  4. Step 4: Simplify right side
    155,878,990.86x = 18,351,502,654,855,964
  5. Step 5: Solve for x
    x = 18,351,502,654,855,964/155,878,990.86
  6. Step 6: Final answer
    x = 117,729,160.00

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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.