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Finding the Fourth Proportional to 102,808.63, 141,875.11 and 57,486.70

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Solution

The fourth proportional to 102,808.63, 141,875.11 and 57,486.70 is: 79,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,808.63 : 141,875.11 = 57,486.70 : x
  2. Step 2: Convert to fraction form
    102,808.63/141,875.11 = 57,486.70/x
  3. Step 3: Cross multiply
    102,808.63x = 141,875.11 × 57,486.70
  4. Step 4: Simplify right side
    102,808.63x = 8,155,931,886.04
  5. Step 5: Solve for x
    x = 8,155,931,886.04/102,808.63
  6. Step 6: Final answer
    x = 79,331.20

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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.