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Finding the Fourth Proportional to 145,886.77, 201,323.58 and 78,818.77

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Solution

The fourth proportional to 145,886.77, 201,323.58 and 78,818.77 is: 108,769.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,886.77 : 201,323.58 = 78,818.77 : x
  2. Step 2: Convert to fraction form
    145,886.77/201,323.58 = 78,818.77/x
  3. Step 3: Cross multiply
    145,886.77x = 201,323.58 × 78,818.77
  4. Step 4: Simplify right side
    145,886.77x = 15,868,076,903.68
  5. Step 5: Solve for x
    x = 15,868,076,903.68/145,886.77
  6. Step 6: Final answer
    x = 108,769.81

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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.