Home / 87,931.60-121,345.42-47,646.45

Finding the Fourth Proportional to 87,931.60, 121,345.42 and 47,646.45

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Solution

The fourth proportional to 87,931.60, 121,345.42 and 47,646.45 is: 65,752.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.60 : 121,345.42 = 47,646.45 : x
  2. Step 2: Convert to fraction form
    87,931.60/121,345.42 = 47,646.45/x
  3. Step 3: Cross multiply
    87,931.60x = 121,345.42 × 47,646.45
  4. Step 4: Simplify right side
    87,931.60x = 5,781,678,486.76
  5. Step 5: Solve for x
    x = 5,781,678,486.76/87,931.60
  6. Step 6: Final answer
    x = 65,752.00

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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.