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Finding the Fourth Proportional to 92,878.13, 128,172.32 and 52,599.74

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Solution

The fourth proportional to 92,878.13, 128,172.32 and 52,599.74 is: 72,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,878.13 : 128,172.32 = 52,599.74 : x
  2. Step 2: Convert to fraction form
    92,878.13/128,172.32 = 52,599.74/x
  3. Step 3: Cross multiply
    92,878.13x = 128,172.32 × 52,599.74
  4. Step 4: Simplify right side
    92,878.13x = 6,741,829,803.34
  5. Step 5: Solve for x
    x = 6,741,829,803.34/92,878.13
  6. Step 6: Final answer
    x = 72,587.92

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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.