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Finding the Fourth Proportional to 78,497.55, 108,288.53 and 46,643.90

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Solution

The fourth proportional to 78,497.55, 108,288.53 and 46,643.90 is: 64,345.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,497.55 : 108,288.53 = 46,643.90 : x
  2. Step 2: Convert to fraction form
    78,497.55/108,288.53 = 46,643.90/x
  3. Step 3: Cross multiply
    78,497.55x = 108,288.53 × 46,643.90
  4. Step 4: Simplify right side
    78,497.55x = 5,050,999,364.47
  5. Step 5: Solve for x
    x = 5,050,999,364.47/78,497.55
  6. Step 6: Final answer
    x = 64,345.95

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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.