Home / 105,531.12-145,637.28-57,788.64

Finding the Fourth Proportional to 105,531.12, 145,637.28 and 57,788.64

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Solution

The fourth proportional to 105,531.12, 145,637.28 and 57,788.64 is: 79,750.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,531.12 : 145,637.28 = 57,788.64 : x
  2. Step 2: Convert to fraction form
    105,531.12/145,637.28 = 57,788.64/x
  3. Step 3: Cross multiply
    105,531.12x = 145,637.28 × 57,788.64
  4. Step 4: Simplify right side
    105,531.12x = 8,416,180,344.50
  5. Step 5: Solve for x
    x = 8,416,180,344.50/105,531.12
  6. Step 6: Final answer
    x = 79,750.70

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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.