Home / 129,572,008-178,811,495.40-77,365,605.76

Finding the Fourth Proportional to 129,572,008, 178,811,495.40 and 77,365,605.76

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Solution

The fourth proportional to 129,572,008, 178,811,495.40 and 77,365,605.76 is: 106,765,804.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,572,008 : 178,811,495.40 = 77,365,605.76 : x
  2. Step 2: Convert to fraction form
    129,572,008/178,811,495.40 = 77,365,605.76/x
  3. Step 3: Cross multiply
    129,572,008x = 178,811,495.40 × 77,365,605.76
  4. Step 4: Simplify right side
    129,572,008x = 13,833,859,658,472,454
  5. Step 5: Solve for x
    x = 13,833,859,658,472,454/129,572,008
  6. Step 6: Final answer
    x = 106,765,804.37

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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.