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Finding the Fourth Proportional to 145,928.88, 201,381.80 and 78,860.88

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Solution

The fourth proportional to 145,928.88, 201,381.80 and 78,860.88 is: 108,827.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,928.88 : 201,381.80 = 78,860.88 : x
  2. Step 2: Convert to fraction form
    145,928.88/201,381.80 = 78,860.88/x
  3. Step 3: Cross multiply
    145,928.88x = 201,381.80 × 78,860.88
  4. Step 4: Simplify right side
    145,928.88x = 15,881,145,569.68
  5. Step 5: Solve for x
    x = 15,881,145,569.68/145,928.88
  6. Step 6: Final answer
    x = 108,827.98

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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.