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Finding the Fourth Proportional to 78,313.62, 108,070.05 and 42,502.91

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Solution

The fourth proportional to 78,313.62, 108,070.05 and 42,502.91 is: 58,652.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,313.62 : 108,070.05 = 42,502.91 : x
  2. Step 2: Convert to fraction form
    78,313.62/108,070.05 = 42,502.91/x
  3. Step 3: Cross multiply
    78,313.62x = 108,070.05 × 42,502.91
  4. Step 4: Simplify right side
    78,313.62x = 4,593,292,038.41
  5. Step 5: Solve for x
    x = 4,593,292,038.41/78,313.62
  6. Step 6: Final answer
    x = 58,652.53

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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.