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Finding the Fourth Proportional to 60,705.40, 91,058.10 and 42,990.70

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Solution

The fourth proportional to 60,705.40, 91,058.10 and 42,990.70 is: 64,486.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,705.40 : 91,058.10 = 42,990.70 : x
  2. Step 2: Convert to fraction form
    60,705.40/91,058.10 = 42,990.70/x
  3. Step 3: Cross multiply
    60,705.40x = 91,058.10 × 42,990.70
  4. Step 4: Simplify right side
    60,705.40x = 3,914,651,459.67
  5. Step 5: Solve for x
    x = 3,914,651,459.67/60,705.40
  6. Step 6: Final answer
    x = 64,486.05

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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.