Home / 155,878,990.61-215,104,254.55-85,314,456.52

Finding the Fourth Proportional to 155,878,990.61, 215,104,254.55 and 85,314,456.52

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Solution

The fourth proportional to 155,878,990.61, 215,104,254.55 and 85,314,456.52 is: 117,729,159.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,878,990.61 : 215,104,254.55 = 85,314,456.52 : x
  2. Step 2: Convert to fraction form
    155,878,990.61/215,104,254.55 = 85,314,456.52/x
  3. Step 3: Cross multiply
    155,878,990.61x = 215,104,254.55 × 85,314,456.52
  4. Step 4: Simplify right side
    155,878,990.61x = 18,351,502,571,321,940
  5. Step 5: Solve for x
    x = 18,351,502,571,321,940/155,878,990.61
  6. Step 6: Final answer
    x = 117,729,159.65

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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.