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Finding the Fourth Proportional to 103,655.61, 155,484.28 and 28,781.59

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Solution

The fourth proportional to 103,655.61, 155,484.28 and 28,781.59 is: 43,172.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.61 : 155,484.28 = 28,781.59 : x
  2. Step 2: Convert to fraction form
    103,655.61/155,484.28 = 28,781.59/x
  3. Step 3: Cross multiply
    103,655.61x = 155,484.28 × 28,781.59
  4. Step 4: Simplify right side
    103,655.61x = 4,475,084,798.41
  5. Step 5: Solve for x
    x = 4,475,084,798.41/103,655.61
  6. Step 6: Final answer
    x = 43,172.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.