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Finding the Fourth Proportional to 72,457.60, 108,686.40 and 47,088.40

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Solution

The fourth proportional to 72,457.60, 108,686.40 and 47,088.40 is: 70,632.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,457.60 : 108,686.40 = 47,088.40 : x
  2. Step 2: Convert to fraction form
    72,457.60/108,686.40 = 47,088.40/x
  3. Step 3: Cross multiply
    72,457.60x = 108,686.40 × 47,088.40
  4. Step 4: Simplify right side
    72,457.60x = 5,117,868,677.76
  5. Step 5: Solve for x
    x = 5,117,868,677.76/72,457.60
  6. Step 6: Final answer
    x = 70,632.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.