Home / 153,780.16-212,217.60-85,801.28

Finding the Fourth Proportional to 153,780.16, 212,217.60 and 85,801.28

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Solution

The fourth proportional to 153,780.16, 212,217.60 and 85,801.28 is: 118,406.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,780.16 : 212,217.60 = 85,801.28 : x
  2. Step 2: Convert to fraction form
    153,780.16/212,217.60 = 85,801.28/x
  3. Step 3: Cross multiply
    153,780.16x = 212,217.60 × 85,801.28
  4. Step 4: Simplify right side
    153,780.16x = 18,208,541,718.53
  5. Step 5: Solve for x
    x = 18,208,541,718.53/153,780.16
  6. Step 6: Final answer
    x = 118,406.31

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1.5x scale

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.