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Finding the Fourth Proportional to 156,915.81, 216,720.23 and 121,533.93

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Solution

The fourth proportional to 156,915.81, 216,720.23 and 121,533.93 is: 167,853.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,915.81 : 216,720.23 = 121,533.93 : x
  2. Step 2: Convert to fraction form
    156,915.81/216,720.23 = 121,533.93/x
  3. Step 3: Cross multiply
    156,915.81x = 216,720.23 × 121,533.93
  4. Step 4: Simplify right side
    156,915.81x = 26,338,860,654.73
  5. Step 5: Solve for x
    x = 26,338,860,654.73/156,915.81
  6. Step 6: Final answer
    x = 167,853.45

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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.