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Finding the Fourth Proportional to 103,643.60, 143,028.16 and 58,931.60

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Solution

The fourth proportional to 103,643.60, 143,028.16 and 58,931.60 is: 81,325.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,643.60 : 143,028.16 = 58,931.60 : x
  2. Step 2: Convert to fraction form
    103,643.60/143,028.16 = 58,931.60/x
  3. Step 3: Cross multiply
    103,643.60x = 143,028.16 × 58,931.60
  4. Step 4: Simplify right side
    103,643.60x = 8,428,878,313.86
  5. Step 5: Solve for x
    x = 8,428,878,313.86/103,643.60
  6. Step 6: Final answer
    x = 81,325.60

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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.