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Finding the Fourth Proportional to 108,312.86, 149,411.68 and 62,985.86

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Solution

The fourth proportional to 108,312.86, 149,411.68 and 62,985.86 is: 86,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,312.86 : 149,411.68 = 62,985.86 : x
  2. Step 2: Convert to fraction form
    108,312.86/149,411.68 = 62,985.86/x
  3. Step 3: Cross multiply
    108,312.86x = 149,411.68 × 62,985.86
  4. Step 4: Simplify right side
    108,312.86x = 9,410,822,254.32
  5. Step 5: Solve for x
    x = 9,410,822,254.32/108,312.86
  6. Step 6: Final answer
    x = 86,885.55

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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.