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Finding the Fourth Proportional to 66,480.60, 91,699.02 and 42,569.40

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Solution

The fourth proportional to 66,480.60, 91,699.02 and 42,569.40 is: 58,717.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,480.60 : 91,699.02 = 42,569.40 : x
  2. Step 2: Convert to fraction form
    66,480.60/91,699.02 = 42,569.40/x
  3. Step 3: Cross multiply
    66,480.60x = 91,699.02 × 42,569.40
  4. Step 4: Simplify right side
    66,480.60x = 3,903,572,261.99
  5. Step 5: Solve for x
    x = 3,903,572,261.99/66,480.60
  6. Step 6: Final answer
    x = 58,717.46

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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.