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Finding the Fourth Proportional to 70,420.98, 97,124.37 and 61,904.98

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Solution

The fourth proportional to 70,420.98, 97,124.37 and 61,904.98 is: 85,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,420.98 : 97,124.37 = 61,904.98 : x
  2. Step 2: Convert to fraction form
    70,420.98/97,124.37 = 61,904.98/x
  3. Step 3: Cross multiply
    70,420.98x = 97,124.37 × 61,904.98
  4. Step 4: Simplify right side
    70,420.98x = 6,012,482,071.62
  5. Step 5: Solve for x
    x = 6,012,482,071.62/70,420.98
  6. Step 6: Final answer
    x = 85,379.13

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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.