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Finding the Fourth Proportional to 109,430.55, 151,005.11 and 61,695.63

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Solution

The fourth proportional to 109,430.55, 151,005.11 and 61,695.63 is: 85,134.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,430.55 : 151,005.11 = 61,695.63 : x
  2. Step 2: Convert to fraction form
    109,430.55/151,005.11 = 61,695.63/x
  3. Step 3: Cross multiply
    109,430.55x = 151,005.11 × 61,695.63
  4. Step 4: Simplify right side
    109,430.55x = 9,316,355,394.67
  5. Step 5: Solve for x
    x = 9,316,355,394.67/109,430.55
  6. Step 6: Final answer
    x = 85,134.87

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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.