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Finding the Fourth Proportional to 153,737.49, 212,158.05 and 85,752.72

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Solution

The fourth proportional to 153,737.49, 212,158.05 and 85,752.72 is: 118,338.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,737.49 : 212,158.05 = 85,752.72 : x
  2. Step 2: Convert to fraction form
    153,737.49/212,158.05 = 85,752.72/x
  3. Step 3: Cross multiply
    153,737.49x = 212,158.05 × 85,752.72
  4. Step 4: Simplify right side
    153,737.49x = 18,193,129,421.49
  5. Step 5: Solve for x
    x = 18,193,129,421.49/153,737.49
  6. Step 6: Final answer
    x = 118,338.92

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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.