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Finding the Fourth Proportional to 89,071.40, 133,607.10 and 42,415.40

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Solution

The fourth proportional to 89,071.40, 133,607.10 and 42,415.40 is: 63,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,071.40 : 133,607.10 = 42,415.40 : x
  2. Step 2: Convert to fraction form
    89,071.40/133,607.10 = 42,415.40/x
  3. Step 3: Cross multiply
    89,071.40x = 133,607.10 × 42,415.40
  4. Step 4: Simplify right side
    89,071.40x = 5,666,998,589.34
  5. Step 5: Solve for x
    x = 5,666,998,589.34/89,071.40
  6. Step 6: Final answer
    x = 63,623.10

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1.5x scale

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.