Home / 96,986.16-145,276.20-78,159.60

Finding the Fourth Proportional to 96,986.16, 145,276.20 and 78,159.60

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Solution

The fourth proportional to 96,986.16, 145,276.20 and 78,159.60 is: 117,075.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,986.16 : 145,276.20 = 78,159.60 : x
  2. Step 2: Convert to fraction form
    96,986.16/145,276.20 = 78,159.60/x
  3. Step 3: Cross multiply
    96,986.16x = 145,276.20 × 78,159.60
  4. Step 4: Simplify right side
    96,986.16x = 11,354,729,681.52
  5. Step 5: Solve for x
    x = 11,354,729,681.52/96,986.16
  6. Step 6: Final answer
    x = 117,075.77

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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.