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Finding the Fourth Proportional to 153,878.23, 212,447.96 and 99,458.89

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Solution

The fourth proportional to 153,878.23, 212,447.96 and 99,458.89 is: 137,315.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,878.23 : 212,447.96 = 99,458.89 : x
  2. Step 2: Convert to fraction form
    153,878.23/212,447.96 = 99,458.89/x
  3. Step 3: Cross multiply
    153,878.23x = 212,447.96 × 99,458.89
  4. Step 4: Simplify right side
    153,878.23x = 21,129,838,188.38
  5. Step 5: Solve for x
    x = 21,129,838,188.38/153,878.23
  6. Step 6: Final answer
    x = 137,315.32

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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.